12426231216243 has 64 divisors (see below), whose sum is σ = 18242293668480. Its totient is φ = 7477302067200.

The previous prime is 12426231216239. The next prime is 12426231216271. The reversal of 12426231216243 is 34261213262421.

It is not a de Polignac number, because 12426231216243 - 2² = 12426231216239 is a prime.

It is a super-2 number, since 2×12426231216243² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (12426231216233) 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 63 ways as a sum of consecutive naturals, for example, 289438603 + ... + 289481531.

It is an arithmetic number, because the mean of its divisors is an integer number (285035838570).

Almost surely, 2^{12426231216243} is an apocalyptic number.

12426231216243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12426231216243 is a deficient number, since it is larger than the sum of its proper divisors (5816062452237).

12426231216243 is a wasteful number, since it uses less digits than its factorization.

12426231216243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43720.

The product of its digits is 165888, while the sum is 39.

Adding to 12426231216243 its reverse (34261213262421), we get a palindrome (46687444478664).

The spelling of 12426231216243 in words is "twelve trillion, four hundred twenty-six billion, two hundred thirty-one million, two hundred sixteen thousand, two hundred forty-three".