33323213221 has 16 divisors (see below), whose sum is σ = 36367588224. Its totient is φ = 30409956864.

The previous prime is 33323213219. The next prime is 33323213227. The reversal of 33323213221 is 12231232333.

It is not a de Polignac number, because 33323213221 - 2¹ = 33323213219 is a prime.

It is a super-2 number, since 2×33323213221² (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 (33323213227) 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 in 15 ways as a sum of consecutive naturals, for example, 66225 + ... + 266518.

It is an arithmetic number, because the mean of its divisors is an integer number (2272974264).

Almost surely, 2^33323213221 is an apocalyptic number.

It is an amenable number.

33323213221 is a deficient number, since it is larger than the sum of its proper divisors (3044375003).

33323213221 is a wasteful number, since it uses less digits than its factorization.

33323213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332940.

The product of its digits is 3888, while the sum is 25.

Adding to 33323213221 its reverse (12231232333), we get a palindrome (45554445554).

The spelling of 33323213221 in words is "thirty-three billion, three hundred twenty-three million, two hundred thirteen thousand, two hundred twenty-one".