13221330211321 has 2 divisors, whose sum is σ = 13221330211322. Its totient is φ = 13221330211320.

The previous prime is 13221330211303. The next prime is 13221330211387. The reversal of 13221330211321 is 12311203312231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12717782440000 + 503547771321 = 3566200^2 + 709611^2 .

It is an emirp because it is prime and its reverse (12311203312231) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13221330211321 is a prime.

It is not a weakly prime, because it can be changed into another prime (13221330214321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610665105660 + 6610665105661.

It is an arithmetic number, because the mean of its divisors is an integer number (6610665105661).

Almost surely, 2^{13221330211321} is an apocalyptic number.

It is an amenable number.

13221330211321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221330211321 is an equidigital number, since it uses as much as digits as its factorization.

13221330211321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 13221330211321 its reverse (12311203312231), we get a palindrome (25532533523552).

The spelling of 13221330211321 in words is "thirteen trillion, two hundred twenty-one billion, three hundred thirty million, two hundred eleven thousand, three hundred twenty-one".