312011131331 has 8 divisors (see below), whose sum is σ = 316261444800. Its totient is φ = 307772511912.

The previous prime is 312011131321. The next prime is 312011131339. The reversal of 312011131331 is 133131110213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312011131331 is a prime.

It is a super-2 number, since 2×312011131331² (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 (312011131339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2869781 + ... + 2976518.

It is an arithmetic number, because the mean of its divisors is an integer number (39532680600).

Almost surely, 2^312011131331 is an apocalyptic number.

312011131331 is a deficient number, since it is larger than the sum of its proper divisors (4250313469).

312011131331 is an equidigital number, since it uses as much as digits as its factorization.

312011131331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5847025.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 312011131331 its reverse (133131110213), we get a palindrome (445142241544).

The spelling of 312011131331 in words is "three hundred twelve billion, eleven million, one hundred thirty-one thousand, three hundred thirty-one".