312031013123 has 4 divisors (see below), whose sum is σ = 312601454280. Its totient is φ = 311460571968.

The previous prime is 312031013113. The next prime is 312031013141. The reversal of 312031013123 is 321310130213.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312031013123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312031013095 and 312031013104.

It is not an unprimeable number, because it can be changed into a prime (312031013113) 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, 285219758 + ... + 285220851.

It is an arithmetic number, because the mean of its divisors is an integer number (78150363570).

Almost surely, 2^312031013123 is an apocalyptic number.

312031013123 is a deficient number, since it is larger than the sum of its proper divisors (570441157).

312031013123 is an equidigital number, since it uses as much as digits as its factorization.

312031013123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570441156.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 312031013123 its reverse (321310130213), we get a palindrome (633341143336).

The spelling of 312031013123 in words is "three hundred twelve billion, thirty-one million, thirteen thousand, one hundred twenty-three".