13312231233221 has 4 divisors (see below), whose sum is σ = 13312552492512. Its totient is φ = 13311909973932.

The previous prime is 13312231233127. The next prime is 13312231233227. The reversal of 13312231233221 is 12233213221331.

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 not a de Polignac number, because 13312231233221 - 2¹⁸ = 13312230971077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13312231233227) 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, 160567481 + ... + 160650366.

It is an arithmetic number, because the mean of its divisors is an integer number (3328138123128).

Almost surely, 2^{13312231233221} is an apocalyptic number.

It is an amenable number.

13312231233221 is a deficient number, since it is larger than the sum of its proper divisors (321259291).

13312231233221 is an equidigital number, since it uses as much as digits as its factorization.

13312231233221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321259290.

The product of its digits is 7776, while the sum is 29.

Adding to 13312231233221 its reverse (12233213221331), we get a palindrome (25545444454552).

The spelling of 13312231233221 in words is "thirteen trillion, three hundred twelve billion, two hundred thirty-one million, two hundred thirty-three thousand, two hundred twenty-one".