312111120031 has 16 divisors (see below), whose sum is σ = 327371159808. Its totient is φ = 296993188800.

The previous prime is 312111120019. The next prime is 312111120037. The reversal of 312111120031 is 130021111213.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 312111120031 - 2⁹ = 312111119519 is a prime.

It is a super-2 number, since 2×312111120031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312111119987 and 312111120014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312111120037) 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, 11833000 + ... + 11859346.

It is an arithmetic number, because the mean of its divisors is an integer number (20460697488).

Almost surely, 2^312111120031 is an apocalyptic number.

312111120031 is a deficient number, since it is larger than the sum of its proper divisors (15260039777).

312111120031 is a wasteful number, since it uses less digits than its factorization.

312111120031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29022.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 312111120031 its reverse (130021111213), we get a palindrome (442132231244).

The spelling of 312111120031 in words is "three hundred twelve billion, one hundred eleven million, one hundred twenty thousand, thirty-one".