12340402031 has 2 divisors, whose sum is σ = 12340402032. Its totient is φ = 12340402030.

The previous prime is 12340402027. The next prime is 12340402043. The reversal of 12340402031 is 13020404321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12340402031 - 2² = 12340402027 is a prime.

It is a super-2 number, since 2×12340402031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12340401994 and 12340402012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12340405031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6170201015 + 6170201016.

It is an arithmetic number, because the mean of its divisors is an integer number (6170201016).

Almost surely, 2^12340402031 is an apocalyptic number.

12340402031 is a deficient number, since it is larger than the sum of its proper divisors (1).

12340402031 is an equidigital number, since it uses as much as digits as its factorization.

12340402031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 12340402031 its reverse (13020404321), we get a palindrome (25360806352).

The spelling of 12340402031 in words is "twelve billion, three hundred forty million, four hundred two thousand, thirty-one".