31123230102 has 32 divisors (see below), whose sum is σ = 70038220800. Its totient is φ = 10243086984.

The previous prime is 31123230071. The next prime is 31123230113. The reversal of 31123230102 is 20103232113.

31123230102 is a `hidden beast` number, since 311 + 23 + 230 + 102 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3643558 + ... + 3652089.

It is an arithmetic number, because the mean of its divisors is an integer number (2188694400).

Almost surely, 2^31123230102 is an apocalyptic number.

31123230102 is an abundant number, since it is smaller than the sum of its proper divisors (38914990698).

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

31123230102 is a wasteful number, since it uses less digits than its factorization.

31123230102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7295737 (or 7295731 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31123230102 its reverse (20103232113), we get a palindrome (51226462215).

The spelling of 31123230102 in words is "thirty-one billion, one hundred twenty-three million, two hundred thirty thousand, one hundred two".