12311202031 has 2 divisors, whose sum is σ = 12311202032. Its totient is φ = 12311202030.

The previous prime is 12311202023. The next prime is 12311202037. The reversal of 12311202031 is 13020211321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12311202031 - 2³ = 12311202023 is a prime.

It is a super-2 number, since 2×12311202031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12311201996 and 12311202014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12311202037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6155601015 + 6155601016.

It is an arithmetic number, because the mean of its divisors is an integer number (6155601016).

Almost surely, 2^12311202031 is an apocalyptic number.

12311202031 is a deficient number, since it is larger than the sum of its proper divisors (1).

12311202031 is an equidigital number, since it uses as much as digits as its factorization.

12311202031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12311202031 its reverse (13020211321), we get a palindrome (25331413352).

The spelling of 12311202031 in words is "twelve billion, three hundred eleven million, two hundred two thousand, thirty-one".