33220012 has 24 divisors (see below), whose sum is σ = 66563840. Its totient is φ = 14210640.

The previous prime is 33220001. The next prime is 33220013. The reversal of 33220012 is 21002233.

It is a happy number.

It is a super-2 number, since 2×33220012² = 2207138394560288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33219974 and 33220001.

It is not an unprimeable number, because it can be changed into a prime (33220013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25087 + ... + 26377.

Almost surely, 2^33220012 is an apocalyptic number.

It is an amenable number.

33220012 is an abundant number, since it is smaller than the sum of its proper divisors (33343828).

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

33220012 is a wasteful number, since it uses less digits than its factorization.

33220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221 (or 2219 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 33220012 is about 5763.6804213974. The cubic root of 33220012 is about 321.4646789866.

Adding to 33220012 its reverse (21002233), we get a palindrome (54222245).

The spelling of 33220012 in words is "thirty-three million, two hundred twenty thousand, twelve".