13112321033221 has 4 divisors (see below), whose sum is σ = 13417258731712. Its totient is φ = 12807383334732.

The previous prime is 13112321033213. The next prime is 13112321033233. The reversal of 13112321033221 is 12233012321131.

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 13112321033221 - 2³ = 13112321033213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13112321063221) 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, 152468849181 + ... + 152468849266.

It is an arithmetic number, because the mean of its divisors is an integer number (3354314682928).

Almost surely, 2^{13112321033221} is an apocalyptic number.

It is an amenable number.

13112321033221 is a deficient number, since it is larger than the sum of its proper divisors (304937698491).

13112321033221 is an equidigital number, since it uses as much as digits as its factorization.

13112321033221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304937698490.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 13112321033221 its reverse (12233012321131), we get a palindrome (25345333354352).

The spelling of 13112321033221 in words is "thirteen trillion, one hundred twelve billion, three hundred twenty-one million, thirty-three thousand, two hundred twenty-one".