12431212251 has 24 divisors (see below), whose sum is σ = 17529048000. Its totient is φ = 7835217264.

The previous prime is 12431212249. The next prime is 12431212273. The reversal of 12431212251 is 15221213421.

It is a happy number.

It is not a de Polignac number, because 12431212251 - 2¹ = 12431212249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12431212231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 528916 + ... + 551918.

It is an arithmetic number, because the mean of its divisors is an integer number (730377000).

Almost surely, 2^12431212251 is an apocalyptic number.

12431212251 is a deficient number, since it is larger than the sum of its proper divisors (5097835749).

12431212251 is a wasteful number, since it uses less digits than its factorization.

12431212251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23543 (or 23524 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

Adding to 12431212251 its reverse (15221213421), we get a palindrome (27652425672).

The spelling of 12431212251 in words is "twelve billion, four hundred thirty-one million, two hundred twelve thousand, two hundred fifty-one".