120002100120 has 96 divisors (see below), whose sum is σ = 445722095520. Its totient is φ = 27429050880.

The previous prime is 120002100109. The next prime is 120002100181. The reversal of 120002100120 is 21001200021.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

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, 23807421 + ... + 23812460.

It is an arithmetic number, because the mean of its divisors is an integer number (4642938495).

Almost surely, 2^120002100120 is an apocalyptic number.

120002100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120002100120 is an abundant number, since it is smaller than the sum of its proper divisors (325719995400).

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

120002100120 is a wasteful number, since it uses less digits than its factorization.

120002100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47619905 (or 47619898 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 120002100120 its reverse (21001200021), we get a palindrome (141003300141).

Subtracting from 120002100120 its reverse (21001200021), we obtain a palindrome (99000900099).

The spelling of 120002100120 in words is "one hundred twenty billion, two million, one hundred thousand, one hundred twenty".