312111023171 has 2 divisors, whose sum is σ = 312111023172. Its totient is φ = 312111023170.

The previous prime is 312111023153. The next prime is 312111023173. The reversal of 312111023171 is 171320111213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312111023171 - 2¹⁴ = 312111006787 is a prime.

Together with 312111023173, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (312111023173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156055511585 + 156055511586.

It is an arithmetic number, because the mean of its divisors is an integer number (156055511586).

Almost surely, 2^312111023171 is an apocalyptic number.

312111023171 is a deficient number, since it is larger than the sum of its proper divisors (1).

312111023171 is an equidigital number, since it uses as much as digits as its factorization.

312111023171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 23.

Adding to 312111023171 its reverse (171320111213), we get a palindrome (483431134384).

The spelling of 312111023171 in words is "three hundred twelve billion, one hundred eleven million, twenty-three thousand, one hundred seventy-one".