312111301031 has 4 divisors (see below), whose sum is σ = 312131677200. Its totient is φ = 312090924864.

The previous prime is 312111301027. The next prime is 312111301057. The reversal of 312111301031 is 130103111213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130103111213 = 17 ⋅7653124189.

It is a cyclic number.

It is not a de Polignac number, because 312111301031 - 2² = 312111301027 is a prime.

It is a super-2 number, since 2×312111301031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312111301331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10165091 + ... + 10195748.

It is an arithmetic number, because the mean of its divisors is an integer number (78032919300).

Almost surely, 2^312111301031 is an apocalyptic number.

312111301031 is a deficient number, since it is larger than the sum of its proper divisors (20376169).

312111301031 is a wasteful number, since it uses less digits than its factorization.

312111301031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20376168.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 312111301031 its reverse (130103111213), we get a palindrome (442214412244).

The spelling of 312111301031 in words is "three hundred twelve billion, one hundred eleven million, three hundred one thousand, thirty-one".