12312353421 has 12 divisors (see below), whose sum is σ = 18358204800. Its totient is φ = 7943453640.

The previous prime is 12312353387. The next prime is 12312353447. The reversal of 12312353421 is 12435321321.

12312353421 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 235 + 3 + 421 = 666.

It is not a de Polignac number, because 12312353421 - 2⁷ = 12312353293 is a prime.

It is a super-2 number, since 2×12312353421² (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 (12312353621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22064871 + ... + 22065428.

It is an arithmetic number, because the mean of its divisors is an integer number (1529850400).

Almost surely, 2^12312353421 is an apocalyptic number.

It is an amenable number.

12312353421 is a deficient number, since it is larger than the sum of its proper divisors (6045851379).

12312353421 is a wasteful number, since it uses less digits than its factorization.

12312353421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44130336 (or 44130333 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

Adding to 12312353421 its reverse (12435321321), we get a palindrome (24747674742).

The spelling of 12312353421 in words is "twelve billion, three hundred twelve million, three hundred fifty-three thousand, four hundred twenty-one".