31123204104 has 64 divisors (see below), whose sum is σ = 84137875200. Its totient is φ = 9556388864.

The previous prime is 31123204081. The next prime is 31123204109. The reversal of 31123204104 is 40140232113.

It is not an unprimeable number, because it can be changed into a prime (31123204109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 792339 + ... + 830690.

It is an arithmetic number, because the mean of its divisors is an integer number (1314654300).

Almost surely, 2^31123204104 is an apocalyptic number.

31123204104 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31123204104 is an abundant number, since it is smaller than the sum of its proper divisors (53014671096).

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

31123204104 is a wasteful number, since it uses less digits than its factorization.

31123204104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623102 (or 1623098 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 31123204104 its reverse (40140232113), we get a palindrome (71263436217).

The spelling of 31123204104 in words is "thirty-one billion, one hundred twenty-three million, two hundred four thousand, one hundred four".