33113021221 has 8 divisors (see below), whose sum is σ = 37864226304. Its totient is φ = 28367009520.

The previous prime is 33113021213. The next prime is 33113021237. The reversal of 33113021221 is 12212031133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33113021221 - 2³ = 33113021213 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 (33113021281) 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 7 ways as a sum of consecutive naturals, for example, 1284670 + ... + 1310191.

It is an arithmetic number, because the mean of its divisors is an integer number (4733028288).

Almost surely, 2^33113021221 is an apocalyptic number.

It is an amenable number.

33113021221 is a deficient number, since it is larger than the sum of its proper divisors (4751205083).

33113021221 is a wasteful number, since it uses less digits than its factorization.

33113021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2596691.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 33113021221 its reverse (12212031133), we get a palindrome (45325052354).

The spelling of 33113021221 in words is "thirty-three billion, one hundred thirteen million, twenty-one thousand, two hundred twenty-one".