13221530239 has 2 divisors, whose sum is σ = 13221530240. Its totient is φ = 13221530238.

The previous prime is 13221530237. The next prime is 13221530263. The reversal of 13221530239 is 93203512231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13221530239 - 2¹ = 13221530237 is a prime.

Together with 13221530237, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 13221530239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13221530237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610765119 + 6610765120.

It is an arithmetic number, because the mean of its divisors is an integer number (6610765120).

Almost surely, 2^13221530239 is an apocalyptic number.

13221530239 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221530239 is an equidigital number, since it uses as much as digits as its factorization.

13221530239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 31.

The spelling of 13221530239 in words is "thirteen billion, two hundred twenty-one million, five hundred thirty thousand, two hundred thirty-nine".