33020021322221 has 2 divisors, whose sum is σ = 33020021322222. Its totient is φ = 33020021322220.

The previous prime is 33020021322199. The next prime is 33020021322389. The reversal of 33020021322221 is 12222312002033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32710678455625 + 309342866596 = 5719325^2 + 556186^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33020021322221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33020021324221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16510010661110 + 16510010661111.

It is an arithmetic number, because the mean of its divisors is an integer number (16510010661111).

Almost surely, 2^{33020021322221} is an apocalyptic number.

It is an amenable number.

33020021322221 is a deficient number, since it is larger than the sum of its proper divisors (1).

33020021322221 is an equidigital number, since it uses as much as digits as its factorization.

33020021322221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 33020021322221 its reverse (12222312002033), we get a palindrome (45242333324254).

The spelling of 33020021322221 in words is "thirty-three trillion, twenty billion, twenty-one million, three hundred twenty-two thousand, two hundred twenty-one".