33021222221 has 8 divisors (see below), whose sum is σ = 36092083104. Its totient is φ = 30026185200.

The previous prime is 33021222211. The next prime is 33021222239. The reversal of 33021222221 is 12222212033.

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 a de Polignac number, because none of the positive numbers 2^k-33021222221 is a prime.

It is a super-2 number, since 2×33021222221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33021222193 and 33021222202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33021222211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18955055 + ... + 18956796.

It is an arithmetic number, because the mean of its divisors is an integer number (4511510388).

Almost surely, 2^33021222221 is an apocalyptic number.

It is an amenable number.

33021222221 is a deficient number, since it is larger than the sum of its proper divisors (3070860883).

33021222221 is a wasteful number, since it uses less digits than its factorization.

33021222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37911931.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 33021222221 its reverse (12222212033), we get a palindrome (45243434254).

The spelling of 33021222221 in words is "thirty-three billion, twenty-one million, two hundred twenty-two thousand, two hundred twenty-one".