33021320220 has 120 divisors (see below), whose sum is σ = 118387588704. Its totient is φ = 7547727744.

The previous prime is 33021320147. The next prime is 33021320221. The reversal of 33021320220 is 2202312033.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 33021320193 and 33021320202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33021320221) 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 39 ways as a sum of consecutive naturals, for example, 1444627 + ... + 1467306.

Almost surely, 2^33021320220 is an apocalyptic number.

33021320220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33021320220 is an abundant number, since it is smaller than the sum of its proper divisors (85366268484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33021320220 is a wasteful number, since it uses less digits than its factorization.

33021320220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2911961 (or 2911950 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 33021320220 its reverse (2202312033), we get a palindrome (35223632253).

The spelling of 33021320220 in words is "thirty-three billion, twenty-one million, three hundred twenty thousand, two hundred twenty".