311120122091 has 2 divisors, whose sum is σ = 311120122092. Its totient is φ = 311120122090.

The previous prime is 311120122063. The next prime is 311120122109. The reversal of 311120122091 is 190221021113.

Together with next prime (311120122109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (190221021113) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311120122091 is a prime.

It is not a weakly prime, because it can be changed into another prime (311120122591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155560061045 + 155560061046.

It is an arithmetic number, because the mean of its divisors is an integer number (155560061046).

Almost surely, 2^311120122091 is an apocalyptic number.

311120122091 is a deficient number, since it is larger than the sum of its proper divisors (1).

311120122091 is an equidigital number, since it uses as much as digits as its factorization.

311120122091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 311120122091 in words is "three hundred eleven billion, one hundred twenty million, one hundred twenty-two thousand, ninety-one".