312120333231 has 16 divisors (see below), whose sum is σ = 485318304000. Its totient is φ = 178354475544.

The previous prime is 312120333199. The next prime is 312120333253. The reversal of 312120333231 is 132333021213.

It is not a de Polignac number, because 312120333231 - 2⁵ = 312120333199 is a prime.

It is a super-2 number, since 2×312120333231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312120333331) 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, 151660941 + ... + 151662998.

It is an arithmetic number, because the mean of its divisors is an integer number (30332394000).

Almost surely, 2^312120333231 is an apocalyptic number.

312120333231 is a deficient number, since it is larger than the sum of its proper divisors (173197970769).

312120333231 is an equidigital number, since it uses as much as digits as its factorization.

312120333231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303323963 (or 303323949 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 312120333231 its reverse (132333021213), we get a palindrome (444453354444).

The spelling of 312120333231 in words is "three hundred twelve billion, one hundred twenty million, three hundred thirty-three thousand, two hundred thirty-one".