12439233243921 has 8 divisors (see below), whose sum is σ = 18093430173024. Its totient is φ = 7538929238720.

The previous prime is 12439233243859. The next prime is 12439233243929. The reversal of 12439233243921 is 12934233293421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12439233243921 - 2²³ = 12439224855313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12439233243929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188473230936 + ... + 188473231001.

It is an arithmetic number, because the mean of its divisors is an integer number (2261678771628).

Almost surely, 2^{12439233243921} is an apocalyptic number.

12439233243921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12439233243921 is a deficient number, since it is larger than the sum of its proper divisors (5654196929103).

12439233243921 is a wasteful number, since it uses less digits than its factorization.

12439233243921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376946461951.

The product of its digits is 1679616, while the sum is 48.

It can be divided in two parts, 1243923 and 3243921, that added together give a palindrome (4487844).

The spelling of 12439233243921 in words is "twelve trillion, four hundred thirty-nine billion, two hundred thirty-three million, two hundred forty-three thousand, nine hundred twenty-one".