311233121331857 has 2 divisors, whose sum is σ = 311233121331858. Its totient is φ = 311233121331856.

The previous prime is 311233121331827. The next prime is 311233121331883. The reversal of 311233121331857 is 758133121332113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 274830614496256 + 36402506835601 = 16578016^2 + 6033449^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311233121331857 is a prime.

It is not a weakly prime, because it can be changed into another prime (311233121331827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155616560665928 + 155616560665929.

It is an arithmetic number, because the mean of its divisors is an integer number (155616560665929).

Almost surely, 2^{311233121331857} is an apocalyptic number.

It is an amenable number.

311233121331857 is a deficient number, since it is larger than the sum of its proper divisors (1).

311233121331857 is an equidigital number, since it uses as much as digits as its factorization.

311233121331857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 44.

The spelling of 311233121331857 in words is "three hundred eleven trillion, two hundred thirty-three billion, one hundred twenty-one million, three hundred thirty-one thousand, eight hundred fifty-seven".