311223022031 has 2 divisors, whose sum is σ = 311223022032. Its totient is φ = 311223022030.

The previous prime is 311223022021. The next prime is 311223022049. The reversal of 311223022031 is 130220322113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311223022031 - 2¹⁰ = 311223021007 is a prime.

It is a super-2 number, since 2×311223022031² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 311223021994 and 311223022012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311223022021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155611511015 + 155611511016.

It is an arithmetic number, because the mean of its divisors is an integer number (155611511016).

Almost surely, 2^311223022031 is an apocalyptic number.

311223022031 is a deficient number, since it is larger than the sum of its proper divisors (1).

311223022031 is an equidigital number, since it uses as much as digits as its factorization.

311223022031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 311223022031 its reverse (130220322113), we get a palindrome (441443344144).

The spelling of 311223022031 in words is "three hundred eleven billion, two hundred twenty-three million, twenty-two thousand, thirty-one".