13002044221 has 4 divisors (see below), whose sum is σ = 13136086012. Its totient is φ = 12868002432.

The previous prime is 13002044197. The next prime is 13002044243. The reversal of 13002044221 is 12244020031.

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 10350824121 + 2651220100 = 101739^2 + 51490^2 .

It is a cyclic number.

It is not a de Polignac number, because 13002044221 - 2⁷ = 13002044093 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 (13002044821) 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, 67020750 + ... + 67020943.

It is an arithmetic number, because the mean of its divisors is an integer number (3284021503).

Almost surely, 2^13002044221 is an apocalyptic number.

It is an amenable number.

13002044221 is a deficient number, since it is larger than the sum of its proper divisors (134041791).

13002044221 is an equidigital number, since it uses as much as digits as its factorization.

13002044221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134041790.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 13002044221 its reverse (12244020031), we get a palindrome (25246064252).

The spelling of 13002044221 in words is "thirteen billion, two million, forty-four thousand, two hundred twenty-one".