What Is a Sexsexagintillion? How Many Zeros Does It Have?

A sexsexagintillion is a very large number name. In the short scale, a sexsexagintillion is 10²⁰¹, which means 1 followed by 201 zeros. Written out in full as a 1 followed by zeros, it has 202 digits. The meaning can differ in the long scale, so this article uses the short-scale value unless stated otherwise.

What Is a Sexsexagintillion?

A sexsexagintillion is a mathematical term used to name an extremely large number. The name is constructed using Latin prefixes. In this naming system, "sex" means six, and "sexaginta" means sixty. Together, they refer to the 66th order of -illion numbers (sixty-six).

In the short-scale system, which is standard in English-speaking countries, each new -illion name after million increases by a factor of 1,000. This naming convention places sexsexagintillion far beyond common numbers like billion or trillion. It is primarily used in theoretical mathematics, physics, and large-number tables to describe quantities that exceed standard comprehension.

How Many Zeros Are in a Sexsexagintillion?

In the short scale, a sexsexagintillion has exactly 201 zeros. The exponent in its scientific notation, 10²⁰¹, directly indicates this zero count. It is important to distinguish the number of zeros from the total number of digits. While there are 201 zeros, the total number of digits is 202 because of the leading digit "1" at the beginning of the number.

Step-by-Step: Why a Sexsexagintillion Is 10²⁰¹

1. In the short scale, million is 10⁶.
2. Each new -illion name after million increases by 1,000, or 10³.
3. Sexagintillion is much later in this sequence and equals 10¹⁸³ in the short scale.
4. Sexsexagintillion is later than sexagintillion and equals 10²⁰¹ in the short scale.
5. 10²⁰¹ means 1 followed by 201 zeros.
6. Therefore, a short-scale sexsexagintillion has 201 zeros and 202 total digits.

Sexsexagintillion in Scientific Notation

Scientific notation is a highly efficient way to write massive numbers without writing out every single digit. A sexsexagintillion is written in scientific notation as 1 × 10²⁰¹, or simply 10²⁰¹. This format is preferred by scientists and mathematicians because it prevents errors that commonly occur when typing or reading long strings of zeros.

Sexsexagintillion Written Out

Writing out a sexsexagintillion in full decimal form is possible but highly impractical. It requires writing the digit 1 followed by 201 consecutive zeros. Because of the length, visual counting is unreliable without grouping the digits into blocks of three using commas. In standard mathematical practice, researchers use scientific notation instead of writing the full decimal format.

How Many Digits Are in a Sexsexagintillion?

A short-scale sexsexagintillion has 202 digits when written as 1 followed by zeros. The first digit is 1, and the remaining 201 digits are all zeros. Confusing the zero count with the total digit count is a frequent mistake when learning about large number names.

Sexsexagintillion vs. Googol

A short-scale sexsexagintillion is much larger than a googol. A googol is defined as 10¹⁰⁰, which is 1 followed by 100 zeros. Since 10²⁰¹ has 101 more zeros than 10¹⁰⁰, a sexsexagintillion is 10¹⁰¹ times larger than a googol.

Sexsexagintillion vs. Sexagintillion

It is easy to confuse these two names because they sound very similar, but they represent entirely different values. In the short scale, sexagintillion is 10¹⁸³, while sexsexagintillion is 10²⁰¹. Because 201 is greater than 183, sexsexagintillion is larger than sexagintillion by a factor of 10¹⁸ (or one quintillion times larger).

Sexsexagintillion vs. Centillion

A short-scale centillion is 10³⁰³, which is 1 followed by 303 zeros. Since 303 is greater than 201, centillion is much larger than sexsexagintillion. In the short scale, a centillion is 10¹⁰² times larger than a sexsexagintillion.

Short Scale vs. Long Scale Note

Large number names can depend on the scale used. This article focus on the short scale, which is commonly used in English-speaking countries. However, in the long scale, which is used in many European countries, the names of large numbers increase by a factor of one million rather than one thousand. In the long scale, a sexsexagintillion commonly refers to 10³⁹⁶. If the exact value of a large number is critical to your work, always verify whether your source uses the short scale or the long scale.

Comparison Table

This table compares sexsexagintillion with other well-known large numbers in the short-scale system.

Number Name	Scientific Notation	Zeros	Digits	What to Notice
googol	10100	100	101	Googol is not an -illion name.
trigintillion	1093	93	94	Smaller than googol and sexsexagintillion.
sexagintillion	10183	183	184	Smaller than sexsexagintillion.
sexsexagintillion	10201	201	202	Larger than googol and sexagintillion.
centillion	10303	303	304	Larger than sexsexagintillion in the short scale.

Common Mistakes with Large Numbers

• Confusing the zero count with the digit count: Many people assume a sexsexagintillion has 201 digits, forgetting that the leading digit "1" makes the total digit count 202.
• Assuming all scales are the same: Forgetting the difference between the short scale (10²⁰¹) and the long scale (10³⁹⁶) can lead to massive calculation errors.
• Confusing similar-sounding names: Treating sexsexagintillion and sexagintillion as the same number when they actually differ by 18 powers of ten.

Quick Practice

1. What is a sexsexagintillion in short-scale scientific notation?
2. How many zeros are in a short-scale sexsexagintillion?
3. How many digits does a short-scale sexsexagintillion have when written as 1 followed by zeros?
4. Which is larger in the short scale: sexsexagintillion or googol?
5. Which is larger in the short scale: sexsexagintillion or centillion?
6. Why can long-scale usage make large number names confusing?

Answers

1. In short-scale scientific notation, a sexsexagintillion is written as 10²⁰¹.
2. There are exactly 201 zeros in a short-scale sexsexagintillion.
3. It has 202 digits because you must count the leading digit 1 in addition to the 201 zeros.
4. Sexsexagintillion is larger than googol in the short scale (10²⁰¹ is greater than 10¹⁰⁰).
5. Centillion is larger than sexsexagintillion in the short scale (10³⁰³ is greater than 10²⁰¹).
6. Long-scale usage can make large number names confusing because the same name can refer to different values (such as 10²⁰¹ in the short scale vs 10³⁹⁶ in the long scale).

FAQs

What is a sexsexagintillion?

A sexsexagintillion is a large number name that represents 10²⁰¹ in the short-scale system, which is commonly used in English-speaking countries.

How many zeros are in a sexsexagintillion?

In the short scale, a sexsexagintillion has exactly 201 zeros when written out after the leading digit 1.

How do you write sexsexagintillion in scientific notation?

In scientific notation, a sexsexagintillion is written as 10²⁰¹.

How many digits are in a sexsexagintillion?

A short-scale sexsexagintillion has 202 total digits when written as a whole number, consisting of the number 1 followed by 201 zeros.

Is sexsexagintillion bigger than googol?

Yes, a short-scale sexsexagintillion (10²⁰¹) is much larger than a googol (10¹⁰⁰).

Is sexsexagintillion bigger than centillion?

No, a short-scale centillion (10³⁰³) is much larger than a short-scale sexsexagintillion (10²⁰¹).

Does sexsexagintillion mean the same thing in short scale and long scale?

No, the value depends on the scale used. In the short scale, it is 10²⁰¹, while in the long scale, it commonly refers to 10³⁹⁶.

Summary

In summary, a sexsexagintillion is a massive number represented as 10²⁰¹ in the short scale. It has 201 zeros and 202 total digits. When working with large numbers, always verify whether you are using the short scale or the long scale to avoid confusing different values like sexagintillion, sexsexagintillion, and centillion.