122310320313991 has 2 divisors, whose sum is σ = 122310320313992. Its totient is φ = 122310320313990.

The previous prime is 122310320313947. The next prime is 122310320314051. The reversal of 122310320313991 is 199313023013221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122310320313991 - 2²³ = 122310311925383 is a prime.

It is a super-2 number, since 2×122310320313991² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122310320313091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61155160156995 + 61155160156996.

It is an arithmetic number, because the mean of its divisors is an integer number (61155160156996).

Almost surely, 2^{122310320313991} is an apocalyptic number.

122310320313991 is a deficient number, since it is larger than the sum of its proper divisors (1).

122310320313991 is an equidigital number, since it uses as much as digits as its factorization.

122310320313991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 40.

The spelling of 122310320313991 in words is "one hundred twenty-two trillion, three hundred ten billion, three hundred twenty million, three hundred thirteen thousand, nine hundred ninety-one".