33321220221 has 8 divisors (see below), whose sum is σ = 44455741920. Its totient is φ = 22200422672.

The previous prime is 33321220217. The next prime is 33321220253. The reversal of 33321220221 is 12202212333.

It is a happy number.

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 33321220221 - 2² = 33321220217 is a prime.

It is a super-2 number, since 2×33321220221² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33321220291) 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, 3425370 + ... + 3435083.

It is an arithmetic number, because the mean of its divisors is an integer number (5556967740).

Almost surely, 2^33321220221 is an apocalyptic number.

It is an amenable number.

33321220221 is a deficient number, since it is larger than the sum of its proper divisors (11134521699).

33321220221 is a wasteful number, since it uses less digits than its factorization.

33321220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6862075.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 33321220221 its reverse (12202212333), we get a palindrome (45523432554).

The spelling of 33321220221 in words is "thirty-three billion, three hundred twenty-one million, two hundred twenty thousand, two hundred twenty-one".