13323310311221 has 4 divisors (see below), whose sum is σ = 13323348661452. Its totient is φ = 13323271960992.

The previous prime is 13323310311151. The next prime is 13323310311251. The reversal of 13323310311221 is 12211301332331.

13323310311221 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 6936317748721 + 6386992562500 = 2633689^2 + 2527250^2 .

It is a cyclic number.

It is not a de Polignac number, because 13323310311221 - 2²² = 13323306116917 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 (13323310311251) 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, 18649190 + ... + 19350423.

It is an arithmetic number, because the mean of its divisors is an integer number (3330837165363).

Almost surely, 2^{13323310311221} is an apocalyptic number.

It is an amenable number.

13323310311221 is a deficient number, since it is larger than the sum of its proper divisors (38350231).

13323310311221 is an equidigital number, since it uses as much as digits as its factorization.

13323310311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38350230.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 13323310311221 its reverse (12211301332331), we get a palindrome (25534611643552).

The spelling of 13323310311221 in words is "thirteen trillion, three hundred twenty-three billion, three hundred ten million, three hundred eleven thousand, two hundred twenty-one".