312123030031 has 4 divisors (see below), whose sum is σ = 319381705192. Its totient is φ = 304864354872.

The previous prime is 312123030013. The next prime is 312123030041. The reversal of 312123030031 is 130030321213.

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 312123030031 - 2³⁷ = 174684076559 is a prime.

It is a super-2 number, since 2×312123030031² (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 = 312123029990 and 312123030008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312123030001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3629337516 + ... + 3629337601.

It is an arithmetic number, because the mean of its divisors is an integer number (79845426298).

Almost surely, 2^312123030031 is an apocalyptic number.

312123030031 is a deficient number, since it is larger than the sum of its proper divisors (7258675161).

312123030031 is an equidigital number, since it uses as much as digits as its factorization.

312123030031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7258675160.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 312123030031 its reverse (130030321213), we get a palindrome (442153351244).

The spelling of 312123030031 in words is "three hundred twelve billion, one hundred twenty-three million, thirty thousand, thirty-one".