12431012121013 has 4 divisors (see below), whose sum is σ = 12431497562380. Its totient is φ = 12430526679648.

The previous prime is 12431012120971. The next prime is 12431012121089. The reversal of 12431012121013 is 31012121013421.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11535655230724 + 895356890289 = 3396418^2 + 946233^2 .

It is a cyclic number.

It is not a de Polignac number, because 12431012121013 - 2¹⁷ = 12431011989941 is a prime.

It is a super-2 number, since 2×12431012121013² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12431012121113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242682270 + ... + 242733487.

It is an arithmetic number, because the mean of its divisors is an integer number (3107874390595).

Almost surely, 2^{12431012121013} is an apocalyptic number.

It is an amenable number.

12431012121013 is a deficient number, since it is larger than the sum of its proper divisors (485441367).

12431012121013 is an equidigital number, since it uses as much as digits as its factorization.

12431012121013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485441366.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 12431012121013 its reverse (31012121013421), we get a palindrome (43443133134434).

The spelling of 12431012121013 in words is "twelve trillion, four hundred thirty-one billion, twelve million, one hundred twenty-one thousand, thirteen".