12443135321 has 4 divisors (see below), whose sum is σ = 13098037200. Its totient is φ = 11788233444.

The previous prime is 12443135311. The next prime is 12443135351. The reversal of 12443135321 is 12353134421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12443135321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12443135311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327450911 + ... + 327450948.

It is an arithmetic number, because the mean of its divisors is an integer number (3274509300).

Almost surely, 2^12443135321 is an apocalyptic number.

It is an amenable number.

12443135321 is a deficient number, since it is larger than the sum of its proper divisors (654901879).

12443135321 is an equidigital number, since it uses as much as digits as its factorization.

12443135321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654901878.

The product of its digits is 8640, while the sum is 29.

Adding to 12443135321 its reverse (12353134421), we get a palindrome (24796269742).

The spelling of 12443135321 in words is "twelve billion, four hundred forty-three million, one hundred thirty-five thousand, three hundred twenty-one".