13200313131221 has 4 divisors (see below), whose sum is σ = 13381139338572. Its totient is φ = 13019486923872.

The previous prime is 13200313131197. The next prime is 13200313131233. The reversal of 13200313131221 is 12213131300231.

13200313131221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6877532475025 + 6322780656196 = 2622505^2 + 2514514^2 .

It is a cyclic number.

It is not a de Polignac number, because 13200313131221 - 2¹⁴ = 13200313114837 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 (13200313131521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90413103566 + ... + 90413103711.

It is an arithmetic number, because the mean of its divisors is an integer number (3345284834643).

Almost surely, 2^{13200313131221} is an apocalyptic number.

It is an amenable number.

13200313131221 is a deficient number, since it is larger than the sum of its proper divisors (180826207351).

13200313131221 is an equidigital number, since it uses as much as digits as its factorization.

13200313131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180826207350.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 13200313131221 its reverse (12213131300231), we get a palindrome (25413444431452).

The spelling of 13200313131221 in words is "thirteen trillion, two hundred billion, three hundred thirteen million, one hundred thirty-one thousand, two hundred twenty-one".