12321204123431 has 32 divisors (see below), whose sum is σ = 15782091840000. Its totient is φ = 9364040543232.

The previous prime is 12321204123427. The next prime is 12321204123457. The reversal of 12321204123431 is 13432140212321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12321204123431 - 2² = 12321204123427 is a prime.

It is a super-2 number, since 2×12321204123431² (a number of 27 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 = 12321204123394 and 12321204123403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321204123491) 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, 14817206 + ... + 15626643.

It is an arithmetic number, because the mean of its divisors is an integer number (493190370000).

Almost surely, 2^{12321204123431} is an apocalyptic number.

12321204123431 is a deficient number, since it is larger than the sum of its proper divisors (3460887716569).

12321204123431 is a wasteful number, since it uses less digits than its factorization.

12321204123431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30444071.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 12321204123431 its reverse (13432140212321), we get a palindrome (25753344335752).

The spelling of 12321204123431 in words is "twelve trillion, three hundred twenty-one billion, two hundred four million, one hundred twenty-three thousand, four hundred thirty-one".