12321025431 has 32 divisors (see below), whose sum is σ = 19313199360. Its totient is φ = 6888192000.

The previous prime is 12321025429. The next prime is 12321025441. The reversal of 12321025431 is 13452012321.

It is not a de Polignac number, because 12321025431 - 2¹ = 12321025429 is a prime.

It is a super-2 number, since 2×12321025431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321025421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 677860 + ... + 695798.

It is an arithmetic number, because the mean of its divisors is an integer number (603537480).

Almost surely, 2^12321025431 is an apocalyptic number.

12321025431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12321025431 is a deficient number, since it is larger than the sum of its proper divisors (6992173929).

12321025431 is a wasteful number, since it uses less digits than its factorization.

12321025431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19567.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 12321025431 its reverse (13452012321), we get a palindrome (25773037752).

The spelling of 12321025431 in words is "twelve billion, three hundred twenty-one million, twenty-five thousand, four hundred thirty-one".