13221220799 has 2 divisors, whose sum is σ = 13221220800. Its totient is φ = 13221220798.

The previous prime is 13221220769. The next prime is 13221220819. The reversal of 13221220799 is 99702212231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13221220799 - 2¹² = 13221216703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13221220769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610610399 + 6610610400.

It is an arithmetic number, because the mean of its divisors is an integer number (6610610400).

Almost surely, 2^13221220799 is an apocalyptic number.

13221220799 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221220799 is an equidigital number, since it uses as much as digits as its factorization.

13221220799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The spelling of 13221220799 in words is "thirteen billion, two hundred twenty-one million, two hundred twenty thousand, seven hundred ninety-nine".