31112313123 has 16 divisors (see below), whose sum is σ = 42454241280. Its totient is φ = 20257808256.

The previous prime is 31112313083. The next prime is 31112313137. The reversal of 31112313123 is 32131321113.

It is a happy number.

It is not a de Polignac number, because 31112313123 - 2⁹ = 31112312611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31112313123.

It is not an unprimeable number, because it can be changed into a prime (31112313143) 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, 162790 + ... + 297867.

It is an arithmetic number, because the mean of its divisors is an integer number (2653390080).

Almost surely, 2^31112313123 is an apocalyptic number.

31112313123 is a deficient number, since it is larger than the sum of its proper divisors (11341928157).

31112313123 is a wasteful number, since it uses less digits than its factorization.

31112313123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461186.

The product of its digits is 324, while the sum is 21.

Adding to 31112313123 its reverse (32131321113), we get a palindrome (63243634236).

The spelling of 31112313123 in words is "thirty-one billion, one hundred twelve million, three hundred thirteen thousand, one hundred twenty-three".