100,000,000,000,000,000,000 is called a hundred quintillion. It is also equivalent to ten to the twentieth power (1020).
In the short scale naming system, which is the most common system used in English-speaking countries today, large numbers are named by grouping digits into sets of three. Each of these groups is then given a name based on the power of one thousand it represents.
Here's a breakdown of number names leading up to and including a hundred quintillion:
- 1,000: Thousand
- 1,000,000: Million
- 1,000,000,000: Billion
- 1,000,000,000,000: Trillion
- 1,000,000,000,000,000: Quadrillion
- 1,000,000,000,000,000,000: Quintillion
- 100,000,000,000,000,000,000: Hundred Quintillion
Therefore, 100,000,000,000,000,000,000 is one hundred quintillion.
