33221120221 has 4 divisors (see below), whose sum is σ = 33230537500. Its totient is φ = 33211702944.

The previous prime is 33221120183. The next prime is 33221120267. The reversal of 33221120221 is 12202112233.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8030668996 + 25190451225 = 89614^2 + 158715^2 .

It is a cyclic number.

It is not a de Polignac number, because 33221120221 - 2¹¹ = 33221118173 is a prime.

It is a super-2 number, since 2×33221120221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33221120321) 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 3 ways as a sum of consecutive naturals, for example, 4703346 + ... + 4710403.

It is an arithmetic number, because the mean of its divisors is an integer number (8307634375).

Almost surely, 2^33221120221 is an apocalyptic number.

It is an amenable number.

33221120221 is a deficient number, since it is larger than the sum of its proper divisors (9417279).

33221120221 is an equidigital number, since it uses as much as digits as its factorization.

33221120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9417278.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 33221120221 its reverse (12202112233), we get a palindrome (45423232454).

The spelling of 33221120221 in words is "thirty-three billion, two hundred twenty-one million, one hundred twenty thousand, two hundred twenty-one".