21113120104 has 32 divisors (see below), whose sum is σ = 40250193480. Its totient is φ = 10381123584.

The previous prime is 21113120071. The next prime is 21113120111. The reversal of 21113120104 is 40102131112.

It can be written as a sum of positive squares in 4 ways, for example, as 9383796900 + 11729323204 = 96870^2 + 108302^2 .

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, 35184 + ... + 208480.

Almost surely, 2^21113120104 is an apocalyptic number.

It is an amenable number.

21113120104 is a deficient number, since it is larger than the sum of its proper divisors (19137073376).

21113120104 is a wasteful number, since it uses less digits than its factorization.

21113120104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173557 (or 173553 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21113120104 its reverse (40102131112), we get a palindrome (61215251216).

The spelling of 21113120104 in words is "twenty-one billion, one hundred thirteen million, one hundred twenty thousand, one hundred four".