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A Undecicentillion (1 Undecicentillion) is 10 to the power of 336 (10^336). This is an exorbitantly astronomical number!

How many zeros in a Undecicentillion?

There are 336 zeros in a Undecicentillion.

What's before Undecicentillion?

A Decicentillion is smaller than a Undecicentillion.

What's after Undecicentillion?

A Duodecicentillion is larger than a Undecicentillion.


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

Is Undecicentillion the largest number?

Undecicentillion 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.

Undecicentillion written out

Undecicentillion is written out as:


Big Numbers

This is just one of many really big numbers!

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