Googol

Googol is a well-known large number, equal to 10100. It is called ten duotrigintillion (S) or ten sexdecilliard in the zillion/zilliard scale.

1 followed by a googol zeroes is a googolplex.

Decimal
10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000