2120121032100 has 72 divisors (see below), whose sum is σ = 6157541100480. Its totient is φ = 563215908480.

The previous prime is 2120121032059. The next prime is 2120121032111. The reversal of 2120121032100 is 12301210212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2120121032100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13356595 + ... + 13514394.

Almost surely, 2^{2120121032100} is an apocalyptic number.

2120121032100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120121032100 is an abundant number, since it is smaller than the sum of its proper divisors (4037420068380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2120121032100 is a wasteful number, since it uses less digits than its factorization.

2120121032100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26871269 (or 26871262 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 2120121032100 its reverse (12301210212), we get a palindrome (2132422242312).

The spelling of 2120121032100 in words is "two trillion, one hundred twenty billion, one hundred twenty-one million, thirty-two thousand, one hundred".