33020033221 has 6 divisors (see below), whose sum is σ = 38411059110. Its totient is φ = 28302885576.

The previous prime is 33020033213. The next prime is 33020033251. The reversal of 33020033221 is 12233002033.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 32578445025 + 441588196 = 180495^2 + 21014^2 .

It is not a de Polignac number, because 33020033221 - 2³ = 33020033213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33020033251) 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 in 5 ways as a sum of consecutive naturals, for example, 336939066 + ... + 336939163.

It is an arithmetic number, because the mean of its divisors is an integer number (6401843185).

Almost surely, 2^33020033221 is an apocalyptic number.

It is an amenable number.

33020033221 is a deficient number, since it is larger than the sum of its proper divisors (5391025889).

33020033221 is an equidigital number, since it uses as much as digits as its factorization.

33020033221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673878243 (or 673878236 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 33020033221 its reverse (12233002033), we get a palindrome (45253035254).

The spelling of 33020033221 in words is "thirty-three billion, twenty million, thirty-three thousand, two hundred twenty-one".