21203032222120 has 32 divisors (see below), whose sum is σ = 54522082857600. Its totient is φ = 7269611047488.

The previous prime is 21203032222103. The next prime is 21203032222139. The reversal of 21203032222120 is 2122223030212.

It is a junction number, because it is equal to n+sod(n) for n = 21203032222091 and 21203032222100.

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, 37862557260 + ... + 37862557819.

It is an arithmetic number, because the mean of its divisors is an integer number (1703815089300).

Almost surely, 2^{21203032222120} is an apocalyptic number.

21203032222120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21203032222120 is an abundant number, since it is smaller than the sum of its proper divisors (33319050635480).

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

21203032222120 is a wasteful number, since it uses less digits than its factorization.

21203032222120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75725115097 (or 75725115093 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21203032222120 its reverse (2122223030212), we get a palindrome (23325255252332).

The spelling of 21203032222120 in words is "twenty-one trillion, two hundred three billion, thirty-two million, two hundred twenty-two thousand, one hundred twenty".