21313121222104 has 32 divisors (see below), whose sum is σ = 42333303178800. Its totient is φ = 10031385237120.

The previous prime is 21313121222083. The next prime is 21313121222111. The reversal of 21313121222104 is 40122212131312.

It is a congruent number.

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, 446529967 + ... + 446577694.

Almost surely, 2^{21313121222104} is an apocalyptic number.

It is an amenable number.

21313121222104 is a deficient number, since it is larger than the sum of its proper divisors (21020181956696).

21313121222104 is a wasteful number, since it uses less digits than its factorization.

21313121222104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893107843 (or 893107839 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 21313121222104 its reverse (40122212131312), we get a palindrome (61435333353416).

The spelling of 21313121222104 in words is "twenty-one trillion, three hundred thirteen billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred four".