13311211223021 has 2 divisors, whose sum is σ = 13311211223022. Its totient is φ = 13311211223020.

The previous prime is 13311211223017. The next prime is 13311211223053. The reversal of 13311211223021 is 12032211211331.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7493418982921 + 5817792240100 = 2737411^2 + 2412010^2 .

It is an emirp because it is prime and its reverse (12032211211331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13311211223021 - 2² = 13311211223017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13311211723021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6655605611510 + 6655605611511.

It is an arithmetic number, because the mean of its divisors is an integer number (6655605611511).

Almost surely, 2^{13311211223021} is an apocalyptic number.

It is an amenable number.

13311211223021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13311211223021 is an equidigital number, since it uses as much as digits as its factorization.

13311211223021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 13311211223021 its reverse (12032211211331), we get a palindrome (25343422434352).

The spelling of 13311211223021 in words is "thirteen trillion, three hundred eleven billion, two hundred eleven million, two hundred twenty-three thousand, twenty-one".