21202022120 has 32 divisors (see below), whose sum is σ = 47708697600. Its totient is φ = 8480071488.

The previous prime is 21202022117. The next prime is 21202022147. The reversal of 21202022120 is 2122020212.

It is a junction number, because it is equal to n+sod(n) for n = 21202022095 and 21202022104.

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, 871157 + ... + 895163.

It is an arithmetic number, because the mean of its divisors is an integer number (1490896800).

Almost surely, 2^21202022120 is an apocalyptic number.

21202022120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202022120 is an abundant number, since it is smaller than the sum of its proper divisors (26506675480).

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

21202022120 is a wasteful number, since it uses less digits than its factorization.

21202022120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46097 (or 46093 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21202022120 its reverse (2122020212), we get a palindrome (23324042332).

The spelling of 21202022120 in words is "twenty-one billion, two hundred two million, twenty-two thousand, one hundred twenty".