33121122220 has 24 divisors (see below), whose sum is σ = 69644836800. Its totient is φ = 13231214592.

The previous prime is 33121122161. The next prime is 33121122241. The reversal of 33121122220 is 2222112133.

It is a super-2 number, since 2×33121122220² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1061380 + ... + 1092139.

It is an arithmetic number, because the mean of its divisors is an integer number (2901868200).

Almost surely, 2^33121122220 is an apocalyptic number.

It is an amenable number.

33121122220 is an abundant number, since it is smaller than the sum of its proper divisors (36523714580).

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

33121122220 is a wasteful number, since it uses less digits than its factorization.

33121122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2154297 (or 2154295 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 33121122220 its reverse (2222112133), we get a palindrome (35343234353).

The spelling of 33121122220 in words is "thirty-three billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred twenty".