13221044209 has 2 divisors, whose sum is σ = 13221044210. Its totient is φ = 13221044208.

The previous prime is 13221044201. The next prime is 13221044219. The reversal of 13221044209 is 90244012231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11729539809 + 1491504400 = 108303^2 + 38620^2 .

It is an emirp because it is prime and its reverse (90244012231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13221044209 - 2³ = 13221044201 is a prime.

It is not a weakly prime, because it can be changed into another prime (13221044201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610522104 + 6610522105.

It is an arithmetic number, because the mean of its divisors is an integer number (6610522105).

Almost surely, 2^13221044209 is an apocalyptic number.

It is an amenable number.

13221044209 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221044209 is an equidigital number, since it uses as much as digits as its factorization.

13221044209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 13221044209 in words is "thirteen billion, two hundred twenty-one million, forty-four thousand, two hundred nine".