13221331289 has 2 divisors, whose sum is σ = 13221331290. Its totient is φ = 13221331288.

The previous prime is 13221331261. The next prime is 13221331313. The reversal of 13221331289 is 98213312231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9013603600 + 4207727689 = 94940^2 + 64867^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13221331289 is a prime.

It is not a weakly prime, because it can be changed into another prime (13221331219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610665644 + 6610665645.

It is an arithmetic number, because the mean of its divisors is an integer number (6610665645).

Almost surely, 2^13221331289 is an apocalyptic number.

It is an amenable number.

13221331289 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221331289 is an equidigital number, since it uses as much as digits as its factorization.

13221331289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The spelling of 13221331289 in words is "thirteen billion, two hundred twenty-one million, three hundred thirty-one thousand, two hundred eighty-nine".