12238766431 has 2 divisors, whose sum is σ = 12238766432. Its totient is φ = 12238766430.

The previous prime is 12238766369. The next prime is 12238766443. The reversal of 12238766431 is 13466783221.

It is a strong prime.

It is an emirp because it is prime and its reverse (13466783221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12238766431 - 2¹¹ = 12238764383 is a prime.

It is a super-2 number, since 2×12238766431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12238766471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6119383215 + 6119383216.

It is an arithmetic number, because the mean of its divisors is an integer number (6119383216).

Almost surely, 2^12238766431 is an apocalyptic number.

12238766431 is a deficient number, since it is larger than the sum of its proper divisors (1).

12238766431 is an equidigital number, since it uses as much as digits as its factorization.

12238766431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 43.

The spelling of 12238766431 in words is "twelve billion, two hundred thirty-eight million, seven hundred sixty-six thousand, four hundred thirty-one".