33020321221 has 8 divisors (see below), whose sum is σ = 33928446464. Its totient is φ = 32118569280.

The previous prime is 33020321209. The next prime is 33020321239. The reversal of 33020321221 is 12212302033.

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 33020321221 - 2⁹ = 33020320709 is a prime.

It is a super-2 number, since 2×33020321221² (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 (33020301221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1582821 + ... + 1603546.

It is an arithmetic number, because the mean of its divisors is an integer number (4241055808).

Almost surely, 2^33020321221 is an apocalyptic number.

It is an amenable number.

33020321221 is a deficient number, since it is larger than the sum of its proper divisors (908125243).

33020321221 is a wasteful number, since it uses less digits than its factorization.

33020321221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3186651.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 33020321221 its reverse (12212302033), we get a palindrome (45232623254).

The spelling of 33020321221 in words is "thirty-three billion, twenty million, three hundred twenty-one thousand, two hundred twenty-one".