13221330202121 has 2 divisors, whose sum is σ = 13221330202122. Its totient is φ = 13221330202120.

The previous prime is 13221330202111. The next prime is 13221330202139. The reversal of 13221330202121 is 12120203312231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13200178572025 + 21151630096 = 3633205^2 + 145436^2 .

It is a cyclic number.

It is not a de Polignac number, because 13221330202121 - 2³⁴ = 13204150332937 is a prime.

It is not a weakly prime, because it can be changed into another prime (13221330202111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610665101060 + 6610665101061.

It is an arithmetic number, because the mean of its divisors is an integer number (6610665101061).

Almost surely, 2^{13221330202121} is an apocalyptic number.

It is an amenable number.

13221330202121 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221330202121 is an equidigital number, since it uses as much as digits as its factorization.

13221330202121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 13221330202121 its reverse (12120203312231), we get a palindrome (25341533514352).

The spelling of 13221330202121 in words is "thirteen trillion, two hundred twenty-one billion, three hundred thirty million, two hundred two thousand, one hundred twenty-one".