33011132220 has 144 divisors (see below), whose sum is σ = 109293649920. Its totient is φ = 7998537600.

The previous prime is 33011132201. The next prime is 33011132233. The reversal of 33011132220 is 2223111033.

33011132220 is a `hidden beast` number, since 330 + 1 + 11 + 322 + 2 + 0 = 666.

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 = 33011132193 and 33011132202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5697525 + ... + 5703315.

It is an arithmetic number, because the mean of its divisors is an integer number (758983680).

Almost surely, 2^33011132220 is an apocalyptic number.

33011132220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33011132220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54646824960).

33011132220 is an abundant number, since it is smaller than the sum of its proper divisors (76282517700).

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

33011132220 is a wasteful number, since it uses less digits than its factorization.

33011132220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8696 (or 8691 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 33011132220 its reverse (2223111033), we get a palindrome (35234243253).

The spelling of 33011132220 in words is "thirty-three billion, eleven million, one hundred thirty-two thousand, two hundred twenty".