12321303131 has 4 divisors (see below), whose sum is σ = 12344862552. Its totient is φ = 12297743712.

The previous prime is 12321303083. The next prime is 12321303161. The reversal of 12321303131 is 13130312321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12321303131 - 2¹⁰ = 12321302107 is a prime.

It is a super-2 number, since 2×12321303131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12321303161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11778926 + ... + 11779971.

It is an arithmetic number, because the mean of its divisors is an integer number (3086215638).

Almost surely, 2^12321303131 is an apocalyptic number.

12321303131 is a deficient number, since it is larger than the sum of its proper divisors (23559421).

12321303131 is an equidigital number, since it uses as much as digits as its factorization.

12321303131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23559420.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 12321303131 its reverse (13130312321), we get a palindrome (25451615452).

The spelling of 12321303131 in words is "twelve billion, three hundred twenty-one million, three hundred three thousand, one hundred thirty-one".