What do you call 100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000?

The number you've written is called a "quindecillion" in the American numbering system, which is 10 raised to the power of 48. In the short scale (used in the U.S.), a quindecillion has 48 zeros following the 1. In the long scale (used in some European countries), the term may have different applications, but the American short scale is more commonly referenced.