13323301220221 has 4 divisors (see below), whose sum is σ = 13324100906844. Its totient is φ = 13322501533600.

The previous prime is 13323301220123. The next prime is 13323301220237. The reversal of 13323301220221 is 12202210332331.

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 4921680132196 + 8401621088025 = 2218486^2 + 2898555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13323301220221 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 (13323301220321) 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, 399818320 + ... + 399851641.

It is an arithmetic number, because the mean of its divisors is an integer number (3331025226711).

Almost surely, 2^{13323301220221} is an apocalyptic number.

It is an amenable number.

13323301220221 is a deficient number, since it is larger than the sum of its proper divisors (799686623).

13323301220221 is an equidigital number, since it uses as much as digits as its factorization.

13323301220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799686622.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 13323301220221 its reverse (12202210332331), we get a palindrome (25525511552552).

The spelling of 13323301220221 in words is "thirteen trillion, three hundred twenty-three billion, three hundred one million, two hundred twenty thousand, two hundred twenty-one".