13221521033249 has 2 divisors, whose sum is σ = 13221521033250. Its totient is φ = 13221521033248.

The previous prime is 13221521033219. The next prime is 13221521033257. The reversal of 13221521033249 is 94233012512231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10730000846224 + 2491520187025 = 3275668^2 + 1578455^2 .

It is an emirp because it is prime and its reverse (94233012512231) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13221521033249 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13221521033219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610760516624 + 6610760516625.

It is an arithmetic number, because the mean of its divisors is an integer number (6610760516625).

Almost surely, 2^{13221521033249} is an apocalyptic number.

It is an amenable number.

13221521033249 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221521033249 is an equidigital number, since it uses as much as digits as its factorization.

13221521033249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 13221521033249 in words is "thirteen trillion, two hundred twenty-one billion, five hundred twenty-one million, thirty-three thousand, two hundred forty-nine".