12440130431 has 2 divisors, whose sum is σ = 12440130432. Its totient is φ = 12440130430.

The previous prime is 12440130427. The next prime is 12440130449. The reversal of 12440130431 is 13403104421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12440130431 - 2² = 12440130427 is a prime.

It is a super-2 number, since 2×12440130431² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 12440130397 and 12440130406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12440130331) 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, 6220065215 + 6220065216.

It is an arithmetic number, because the mean of its divisors is an integer number (6220065216).

Almost surely, 2^12440130431 is an apocalyptic number.

12440130431 is a deficient number, since it is larger than the sum of its proper divisors (1).

12440130431 is an equidigital number, since it uses as much as digits as its factorization.

12440130431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 12440130431 its reverse (13403104421), we get a palindrome (25843234852).

The spelling of 12440130431 in words is "twelve billion, four hundred forty million, one hundred thirty thousand, four hundred thirty-one".