31113012123 has 12 divisors (see below), whose sum is σ = 46490708160. Its totient is φ = 20026766256.

The previous prime is 31113012109. The next prime is 31113012131. The reversal of 31113012123 is 32121031113.

It is not a de Polignac number, because 31113012123 - 2²⁴ = 31096234907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31113012096 and 31113012105.

It is not an unprimeable number, because it can be changed into a prime (31113012193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59603211 + ... + 59603732.

It is an arithmetic number, because the mean of its divisors is an integer number (3874225680).

Almost surely, 2^31113012123 is an apocalyptic number.

31113012123 is a deficient number, since it is larger than the sum of its proper divisors (15377696037).

31113012123 is a wasteful number, since it uses less digits than its factorization.

31113012123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119206978 (or 119206975 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31113012123 its reverse (32121031113), we get a palindrome (63234043236).

The spelling of 31113012123 in words is "thirty-one billion, one hundred thirteen million, twelve thousand, one hundred twenty-three".