13321213310021 has 2 divisors, whose sum is σ = 13321213310022. Its totient is φ = 13321213310020.

The previous prime is 13321213309973. The next prime is 13321213310033. The reversal of 13321213310021 is 12001331212331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9002460168100 + 4318753141921 = 3000410^2 + 2078161^2 .

It is an emirp because it is prime and its reverse (12001331212331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13321213310021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13321213310051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6660606655010 + 6660606655011.

It is an arithmetic number, because the mean of its divisors is an integer number (6660606655011).

Almost surely, 2^{13321213310021} is an apocalyptic number.

It is an amenable number.

13321213310021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13321213310021 is an equidigital number, since it uses as much as digits as its factorization.

13321213310021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 13321213310021 its reverse (12001331212331), we get a palindrome (25322544522352).

The spelling of 13321213310021 in words is "thirteen trillion, three hundred twenty-one billion, two hundred thirteen million, three hundred ten thousand, twenty-one".