21104122404 has 12 divisors (see below), whose sum is σ = 49242952304. Its totient is φ = 7034707464.

The previous prime is 21104122399. The next prime is 21104122421. The reversal of 21104122404 is 40422140112.

It is a tau number, because it is divible by the number of its divisors (12).

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, 879338422 + ... + 879338445.

Almost surely, 2^21104122404 is an apocalyptic number.

It is an amenable number.

21104122404 is an abundant number, since it is smaller than the sum of its proper divisors (28138829900).

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

21104122404 is a wasteful number, since it uses less digits than its factorization.

21104122404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758676874 (or 1758676872 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21104122404 its reverse (40422140112), we get a palindrome (61526262516).

The spelling of 21104122404 in words is "twenty-one billion, one hundred four million, one hundred twenty-two thousand, four hundred four".