21002100110120 has 32 divisors (see below), whose sum is σ = 47502132203520. Its totient is φ = 8356856585280.

The previous prime is 21002100110111. The next prime is 21002100110203. The reversal of 21002100110120 is 2101100120012.

It is a super-2 number, since 2×21002100110120² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1374475352 + ... + 1374490631.

It is an arithmetic number, because the mean of its divisors is an integer number (1484441631360).

Almost surely, 2^{21002100110120} is an apocalyptic number.

21002100110120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21002100110120 is an abundant number, since it is smaller than the sum of its proper divisors (26500032093400).

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

21002100110120 is a wasteful number, since it uses less digits than its factorization.

21002100110120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2748966185 (or 2748966181 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21002100110120 its reverse (2101100120012), we get a palindrome (23103200230132).

The spelling of 21002100110120 in words is "twenty-one trillion, two billion, one hundred million, one hundred ten thousand, one hundred twenty".