12431213421 has 24 divisors (see below), whose sum is σ = 18399185952. Its totient is φ = 7459452000.

The previous prime is 12431213401. The next prime is 12431213453.

12431213421 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12431213421 - 2⁹ = 12431212909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12431213391 and 12431213400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12431213401) 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 23 ways as a sum of consecutive naturals, for example, 132871 + ... + 206196.

It is an arithmetic number, because the mean of its divisors is an integer number (766632748).

Almost surely, 2^12431213421 is an apocalyptic number.

12431213421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12431213421 is a deficient number, since it is larger than the sum of its proper divisors (5967972531).

12431213421 is a wasteful number, since it uses less digits than its factorization.

12431213421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339193 (or 339182 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The spelling of 12431213421 in words is "twelve billion, four hundred thirty-one million, two hundred thirteen thousand, four hundred twenty-one".