12431531321 has 32 divisors (see below), whose sum is σ = 14308842240. Its totient is φ = 10697011200.

The previous prime is 12431531267. The next prime is 12431531353. The reversal of 12431531321 is 12313513421.

It is a cyclic number.

It is not a de Polignac number, because 12431531321 - 2³⁰ = 11357789497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12431531381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7324745 + ... + 7326441.

It is an arithmetic number, because the mean of its divisors is an integer number (447151320).

Almost surely, 2^12431531321 is an apocalyptic number.

12431531321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12431531321 is a deficient number, since it is larger than the sum of its proper divisors (1877310919).

12431531321 is a wasteful number, since it uses less digits than its factorization.

12431531321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225.

The product of its digits is 2160, while the sum is 26.

The spelling of 12431531321 in words is "twelve billion, four hundred thirty-one million, five hundred thirty-one thousand, three hundred twenty-one".