312111023197 has 2 divisors, whose sum is σ = 312111023198. Its totient is φ = 312111023196.

The previous prime is 312111023173. The next prime is 312111023209. The reversal of 312111023197 is 791320111213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238442749636 + 73668273561 = 488306^2 + 271419^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312111023197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312111027197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156055511598 + 156055511599.

It is an arithmetic number, because the mean of its divisors is an integer number (156055511599).

Almost surely, 2^312111023197 is an apocalyptic number.

It is an amenable number.

312111023197 is a deficient number, since it is larger than the sum of its proper divisors (1).

312111023197 is an equidigital number, since it uses as much as digits as its factorization.

312111023197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 31.

The spelling of 312111023197 in words is "three hundred twelve billion, one hundred eleven million, twenty-three thousand, one hundred ninety-seven".