21122402104 has 16 divisors (see below), whose sum is σ = 39614346000. Its totient is φ = 10558576512.

The previous prime is 21122402069. The next prime is 21122402137. The reversal of 21122402104 is 40120422112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293652 + ... + 358435.

It is an arithmetic number, because the mean of its divisors is an integer number (2475896625).

Almost surely, 2^21122402104 is an apocalyptic number.

It is an amenable number.

21122402104 is a deficient number, since it is larger than the sum of its proper divisors (18491943896).

21122402104 is a wasteful number, since it uses less digits than its factorization.

21122402104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656142 (or 656138 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21122402104 its reverse (40120422112), we get a palindrome (61242824216).

The spelling of 21122402104 in words is "twenty-one billion, one hundred twenty-two million, four hundred two thousand, one hundred four".