13304144221 has 4 divisors (see below), whose sum is σ = 13426200700. Its totient is φ = 13182087744.

The previous prime is 13304144213. The next prime is 13304144251. The reversal of 13304144221 is 12244140331.

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 5667831225 + 7636312996 = 75285^2 + 87386^2 .

It is a cyclic number.

It is not a de Polignac number, because 13304144221 - 2³ = 13304144213 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 (13304144201) 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, 61028076 + ... + 61028293.

It is an arithmetic number, because the mean of its divisors is an integer number (3356550175).

Almost surely, 2^13304144221 is an apocalyptic number.

It is an amenable number.

13304144221 is a deficient number, since it is larger than the sum of its proper divisors (122056479).

13304144221 is a wasteful number, since it uses less digits than its factorization.

13304144221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122056478.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 13304144221 its reverse (12244140331), we get a palindrome (25548284552).

The spelling of 13304144221 in words is "thirteen billion, three hundred four million, one hundred forty-four thousand, two hundred twenty-one".