12424421431 has 2 divisors, whose sum is σ = 12424421432. Its totient is φ = 12424421430.

The previous prime is 12424421393. The next prime is 12424421441. The reversal of 12424421431 is 13412442421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12424421431 is a prime.

It is a super-2 number, since 2×12424421431² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12424421431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12424421441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6212210715 + 6212210716.

It is an arithmetic number, because the mean of its divisors is an integer number (6212210716).

Almost surely, 2^12424421431 is an apocalyptic number.

12424421431 is a deficient number, since it is larger than the sum of its proper divisors (1).

12424421431 is an equidigital number, since it uses as much as digits as its factorization.

12424421431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6144, while the sum is 28.

Adding to 12424421431 its reverse (13412442421), we get a palindrome (25836863852).

The spelling of 12424421431 in words is "twelve billion, four hundred twenty-four million, four hundred twenty-one thousand, four hundred thirty-one".