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A Duotrigintillion (1 Duotrigintillion) is 10 to the power of 99 (10^99). This is a humongous number!

How many zeros in a Duotrigintillion?

There are 99 zeros in a Duotrigintillion.

What's before Duotrigintillion?

A Untrigintillion is smaller than a Duotrigintillion.

What's after Duotrigintillion?

A Trestrigintillion is larger than a Duotrigintillion.


A Duotrigintillionaire is someone whos assets, net worth or wealth is 1 or more Duotrigintillion. It is unlikely anyone will ever be a true Duotrigintillionaire. If you want to be a Duotrigintillionaire, play Tap Tales!

Is Duotrigintillion the largest number?

Duotrigintillion is not the largest number. Infinity best describes the largest possible number - if there even is one! We cannot comprehend what the largest number actually is.

Duotrigintillion written out

Duotrigintillion is written out as:


Big Numbers

This is just one of many really big numbers!

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