13323310220021 has 2 divisors, whose sum is σ = 13323310220022. Its totient is φ = 13323310220020.

The previous prime is 13323310219981. The next prime is 13323310220071. The reversal of 13323310220021 is 12002201332331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12552494702500 + 770815517521 = 3542950^2 + 877961^2 .

It is a cyclic number.

It is not a de Polignac number, because 13323310220021 - 2²² = 13323306025717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13323310220071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6661655110010 + 6661655110011.

It is an arithmetic number, because the mean of its divisors is an integer number (6661655110011).

Almost surely, 2^{13323310220021} is an apocalyptic number.

It is an amenable number.

13323310220021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13323310220021 is an equidigital number, since it uses as much as digits as its factorization.

13323310220021 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 23.

Adding to 13323310220021 its reverse (12002201332331), we get a palindrome (25325511552352).

The spelling of 13323310220021 in words is "thirteen trillion, three hundred twenty-three billion, three hundred ten million, two hundred twenty thousand, twenty-one".