12440311031 has 2 divisors, whose sum is σ = 12440311032. Its totient is φ = 12440311030.

The previous prime is 12440311003. The next prime is 12440311063. The reversal of 12440311031 is 13011304421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12440311031 - 2²² = 12436116727 is a prime.

It is a super-3 number, since 3×12440311031³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 12440310994 and 12440311012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12440311531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6220155515 + 6220155516.

It is an arithmetic number, because the mean of its divisors is an integer number (6220155516).

Almost surely, 2^12440311031 is an apocalyptic number.

12440311031 is a deficient number, since it is larger than the sum of its proper divisors (1).

12440311031 is an equidigital number, since it uses as much as digits as its factorization.

12440311031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 12440311031 its reverse (13011304421), we get a palindrome (25451615452).

The spelling of 12440311031 in words is "twelve billion, four hundred forty million, three hundred eleven thousand, thirty-one".