33021022221 has 20 divisors (see below), whose sum is σ = 53812037664. Its totient is φ = 20012740200.

The previous prime is 33021022219. The next prime is 33021022313. The reversal of 33021022221 is 12222012033.

It is not a de Polignac number, because 33021022221 - 2¹ = 33021022219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 33021022194 and 33021022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33021022211) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18529425 + ... + 18531206.

Almost surely, 2^33021022221 is an apocalyptic number.

It is an amenable number.

33021022221 is a deficient number, since it is larger than the sum of its proper divisors (20791015443).

33021022221 is a wasteful number, since it uses less digits than its factorization.

33021022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37060654 (or 37060645 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 33021022221 its reverse (12222012033), we get a palindrome (45243034254).

The spelling of 33021022221 in words is "thirty-three billion, twenty-one million, twenty-two thousand, two hundred twenty-one".