12311020031 has 2 divisors, whose sum is σ = 12311020032. Its totient is φ = 12311020030.

The previous prime is 12311020019. The next prime is 12311020109. The reversal of 12311020031 is 13002011321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12311020031 - 2⁶ = 12311019967 is a prime.

It is a super-2 number, since 2×12311020031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12311019988 and 12311020015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12311010031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6155510015 + 6155510016.

It is an arithmetic number, because the mean of its divisors is an integer number (6155510016).

Almost surely, 2^12311020031 is an apocalyptic number.

12311020031 is a deficient number, since it is larger than the sum of its proper divisors (1).

12311020031 is an equidigital number, since it uses as much as digits as its factorization.

12311020031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 12311020031 its reverse (13002011321), we get a palindrome (25313031352).

The spelling of 12311020031 in words is "twelve billion, three hundred eleven million, twenty thousand, thirty-one".