33112222220 has 96 divisors (see below), whose sum is σ = 87148486656. Its totient is φ = 10266566400.

The previous prime is 33112222219. The next prime is 33112222223. The reversal of 33112222220 is 2222221133.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 33112222192 and 33112222201.

It is not an unprimeable number, because it can be changed into a prime (33112222223) 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 31 ways as a sum of consecutive naturals, for example, 237854 + ... + 350426.

It is an arithmetic number, because the mean of its divisors is an integer number (907796736).

Almost surely, 2^33112222220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33112222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43574243328).

33112222220 is an abundant number, since it is smaller than the sum of its proper divisors (54036264436).

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

33112222220 is a wasteful number, since it uses less digits than its factorization.

33112222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112791 (or 112789 counting only the distinct ones).

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

Adding to 33112222220 its reverse (2222221133), we get a palindrome (35334443353).

The spelling of 33112222220 in words is "thirty-three billion, one hundred twelve million, two hundred twenty-two thousand, two hundred twenty".