312111011031 has 16 divisors (see below), whose sum is σ = 416842322400. Its totient is φ = 207727123968.

The previous prime is 312111010993. The next prime is 312111011089. The reversal of 312111011031 is 130110111213.

It is not a de Polignac number, because 312111011031 - 2¹¹ = 312111008983 is a prime.

It is a super-2 number, since 2×312111011031² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 312111011031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312111031031) 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 15 ways as a sum of consecutive naturals, for example, 4771515 + ... + 4836483.

It is an arithmetic number, because the mean of its divisors is an integer number (26052645150).

Almost surely, 2^312111011031 is an apocalyptic number.

312111011031 is a deficient number, since it is larger than the sum of its proper divisors (104731311369).

312111011031 is a wasteful number, since it uses less digits than its factorization.

312111011031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67618.

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 312111011031 its reverse (130110111213), we get a palindrome (442221122244).

The spelling of 312111011031 in words is "three hundred twelve billion, one hundred eleven million, eleven thousand, thirty-one".