33221012 has 48 divisors (see below), whose sum is σ = 65802240. Its totient is φ = 14546400.

The previous prime is 33221011. The next prime is 33221047. The reversal of 33221012 is 21012233.

It is a happy number.

It is a super-2 number, since 2×33221012² = 2207271276608288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33221011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173837 + ... + 174027.

It is an arithmetic number, because the mean of its divisors is an integer number (1370880).

Almost surely, 2^33221012 is an apocalyptic number.

It is an amenable number.

33221012 is a deficient number, since it is larger than the sum of its proper divisors (32581228).

33221012 is a wasteful number, since it uses less digits than its factorization.

33221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332 (or 330 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 33221012 is about 5763.7671708701. The cubic root of 33221012 is about 321.4679045670.

Adding to 33221012 its reverse (21012233), we get a palindrome (54233245).

It can be divided in two parts, 3322 and 1012, that added together give a palindrome (4334).

The spelling of 33221012 in words is "thirty-three million, two hundred twenty-one thousand, twelve".