12431320212131 has 4 divisors (see below), whose sum is σ = 12445495036512. Its totient is φ = 12417145387752.

The previous prime is 12431320212121. The next prime is 12431320212331. The reversal of 12431320212131 is 13121202313421.

12431320212131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12431320212131 - 2¹⁴ = 12431320195747 is a prime.

It is a super-2 number, since 2×12431320212131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12431320212131.

It is not an unprimeable number, because it can be changed into a prime (12431320212121) 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, 7087410875 + ... + 7087412628.

It is an arithmetic number, because the mean of its divisors is an integer number (3111373759128).

Almost surely, 2^{12431320212131} is an apocalyptic number.

12431320212131 is a deficient number, since it is larger than the sum of its proper divisors (14174824381).

12431320212131 is an equidigital number, since it uses as much as digits as its factorization.

12431320212131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14174824380.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 12431320212131 its reverse (13121202313421), we get a palindrome (25552522525552).

The spelling of 12431320212131 in words is "twelve trillion, four hundred thirty-one billion, three hundred twenty million, two hundred twelve thousand, one hundred thirty-one".