312111302031 has 40 divisors (see below), whose sum is σ = 468196557840. Its totient is φ = 207202084992.

The previous prime is 312111301979. The next prime is 312111302051. The reversal of 312111302031 is 130203111213.

It is not a de Polignac number, because 312111302031 - 2¹⁸ = 312111039887 is a prime.

It is a super-2 number, since 2×312111302031² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 312111301995 and 312111302013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312111302051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 55169755 + ... + 55175411.

It is an arithmetic number, because the mean of its divisors is an integer number (11704913946).

Almost surely, 2^312111302031 is an apocalyptic number.

312111302031 is a deficient number, since it is larger than the sum of its proper divisors (156085255809).

312111302031 is a wasteful number, since it uses less digits than its factorization.

312111302031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8405 (or 8396 counting only the distinct ones).

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

Adding to 312111302031 its reverse (130203111213), we get a palindrome (442314413244).

The spelling of 312111302031 in words is "three hundred twelve billion, one hundred eleven million, three hundred two thousand, thirty-one".