312112311331 has 4 divisors (see below), whose sum is σ = 312534656200. Its totient is φ = 311689966464.

The previous prime is 312112311211. The next prime is 312112311347. The reversal of 312112311331 is 133113211213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312112311331 - 2²⁹ = 311575440419 is a prime.

It is a super-2 number, since 2×312112311331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312112315331) 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, 211171326 + ... + 211172803.

It is an arithmetic number, because the mean of its divisors is an integer number (78133664050).

Almost surely, 2^312112311331 is an apocalyptic number.

312112311331 is a deficient number, since it is larger than the sum of its proper divisors (422344869).

312112311331 is an equidigital number, since it uses as much as digits as its factorization.

312112311331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422344868.

The product of its digits is 324, while the sum is 22.

Adding to 312112311331 its reverse (133113211213), we get a palindrome (445225522544).

The spelling of 312112311331 in words is "three hundred twelve billion, one hundred twelve million, three hundred eleven thousand, three hundred thirty-one".