33221312012 has 12 divisors (see below), whose sum is σ = 66442624080. Its totient is φ = 14237705136.

The previous prime is 33221311999. The next prime is 33221312021. The reversal of 33221312012 is 21021312233.

33221312012 is an admirable number.

It is a super-2 number, since 2×33221312012² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 593237687 + ... + 593237742.

It is an arithmetic number, because the mean of its divisors is an integer number (5536885340).

Almost surely, 2^33221312012 is an apocalyptic number.

It is an amenable number.

33221312012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

33221312012 is a wasteful number, since it uses less digits than its factorization.

33221312012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186475440 (or 1186475438 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 33221312012 its reverse (21021312233), we get a palindrome (54242624245).

The spelling of 33221312012 in words is "thirty-three billion, two hundred twenty-one million, three hundred twelve thousand, twelve".