12431211213421 has 96 divisors (see below), whose sum is σ = 17311145765760. Its totient is φ = 8772674803200.

The previous prime is 12431211213413. The next prime is 12431211213503.

12431211213421 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12431211213421 - 2³ = 12431211213413 is a prime.

It is a super-2 number, since 2×12431211213421² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12431211213421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12431211217421) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 169651890 + ... + 169725148.

It is an arithmetic number, because the mean of its divisors is an integer number (180324435060).

Almost surely, 2^{12431211213421} is an apocalyptic number.

12431211213421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12431211213421 is a deficient number, since it is larger than the sum of its proper divisors (4879934552339).

12431211213421 is a wasteful number, since it uses less digits than its factorization.

12431211213421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73755 (or 73748 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

It can be divided in two parts, 1243121 and 1213421, that added together give a palindrome (2456542).

The spelling of 12431211213421 in words is "twelve trillion, four hundred thirty-one billion, two hundred eleven million, two hundred thirteen thousand, four hundred twenty-one".