33220013221 has 4 divisors (see below), whose sum is σ = 33992571712. Its totient is φ = 32447454732.

The previous prime is 33220013173. The next prime is 33220013227. The reversal of 33220013221 is 12231002233.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 33220013221 - 2⁷ = 33220013093 is a prime.

It is a super-2 number, since 2×33220013221² (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 (33220013227) 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, 386279181 + ... + 386279266.

It is an arithmetic number, because the mean of its divisors is an integer number (8498142928).

Almost surely, 2^33220013221 is an apocalyptic number.

It is an amenable number.

33220013221 is a deficient number, since it is larger than the sum of its proper divisors (772558491).

33220013221 is an equidigital number, since it uses as much as digits as its factorization.

33220013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772558490.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 33220013221 its reverse (12231002233), we get a palindrome (45451015454).

The spelling of 33220013221 in words is "thirty-three billion, two hundred twenty million, thirteen thousand, two hundred twenty-one".