312113011231 has 4 divisors (see below), whose sum is σ = 356700584272. Its totient is φ = 267525438192.

The previous prime is 312113011213. The next prime is 312113011261. The reversal of 312113011231 is 132110311213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132110311213 = 23053 ⋅5730721.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312113011231 is a prime.

It is a super-2 number, since 2×312113011231² (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 = 312113011199 and 312113011208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312113011261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22293786510 + ... + 22293786523.

It is an arithmetic number, because the mean of its divisors is an integer number (89175146068).

Almost surely, 2^312113011231 is an apocalyptic number.

312113011231 is a deficient number, since it is larger than the sum of its proper divisors (44587573041).

312113011231 is an equidigital number, since it uses as much as digits as its factorization.

312113011231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44587573040.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 312113011231 its reverse (132110311213), we get a palindrome (444223322444).

The spelling of 312113011231 in words is "three hundred twelve billion, one hundred thirteen million, eleven thousand, two hundred thirty-one".