12400024231 has 6 divisors (see below), whose sum is σ = 14424518040. Its totient is φ = 10628592156.

The previous prime is 12400024229. The next prime is 12400024393. The reversal of 12400024231 is 13242000421.

It is not a de Polignac number, because 12400024231 - 2¹ = 12400024229 is a prime.

It is a super-2 number, since 2×12400024231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12400024199 and 12400024208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12400004231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 126530811 + ... + 126530908.

It is an arithmetic number, because the mean of its divisors is an integer number (2404086340).

Almost surely, 2^12400024231 is an apocalyptic number.

12400024231 is a deficient number, since it is larger than the sum of its proper divisors (2024493809).

12400024231 is an equidigital number, since it uses as much as digits as its factorization.

12400024231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253061733 (or 253061726 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 12400024231 its reverse (13242000421), we get a palindrome (25642024652).

The spelling of 12400024231 in words is "twelve billion, four hundred million, twenty-four thousand, two hundred thirty-one".