21022120104 has 32 divisors (see below), whose sum is σ = 53275240320. Its totient is φ = 6911381376.

The previous prime is 21022120043. The next prime is 21022120121. The reversal of 21022120104 is 40102122012.

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, 5997712 + ... + 6001215.

It is an arithmetic number, because the mean of its divisors is an integer number (1664851260).

Almost surely, 2^21022120104 is an apocalyptic number.

21022120104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21022120104 is an abundant number, since it is smaller than the sum of its proper divisors (32253120216).

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

21022120104 is a wasteful number, since it uses less digits than its factorization.

21022120104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11999009 (or 11999005 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21022120104 its reverse (40102122012), we get a palindrome (61124242116).

The spelling of 21022120104 in words is "twenty-one billion, twenty-two million, one hundred twenty thousand, one hundred four".