311320223131 has 2 divisors, whose sum is σ = 311320223132. Its totient is φ = 311320223130.

The previous prime is 311320223113. The next prime is 311320223141. The reversal of 311320223131 is 131322023113.

Together with previous prime (311320223113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311320223131 - 2⁷ = 311320223003 is a prime.

It is a super-2 number, since 2×311320223131² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (311320223101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155660111565 + 155660111566.

It is an arithmetic number, because the mean of its divisors is an integer number (155660111566).

Almost surely, 2^311320223131 is an apocalyptic number.

311320223131 is a deficient number, since it is larger than the sum of its proper divisors (1).

311320223131 is an equidigital number, since it uses as much as digits as its factorization.

311320223131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 311320223131 its reverse (131322023113), we get a palindrome (442642246244).

The spelling of 311320223131 in words is "three hundred eleven billion, three hundred twenty million, two hundred twenty-three thousand, one hundred thirty-one".