Googol

A googol is a really big number! It's so big, that we wrote it using something called a "number word". Googol is equal to 10 to the 100th power, which means it's 1 with one-hundred zeros after it: 100,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000. That's a lot of zeros!