33221333312 has 28 divisors (see below), whose sum is σ = 66664309140. Its totient is φ = 16424027136.

The previous prime is 33221333291. The next prime is 33221333317. The reversal of 33221333312 is 21333312233.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12191693056 + 21029640256 = 110416^2 + 145016^2 .

It is a super-2 number, since 2×33221333312² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33221333317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2910503 + ... + 2921894.

Almost surely, 2^33221333312 is an apocalyptic number.

33221333312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

33221333312 is an abundant number, since it is smaller than the sum of its proper divisors (33442975828).

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

33221333312 is an equidigital number, since it uses as much as digits as its factorization.

33221333312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5832498 (or 5832488 counting only the distinct ones).

The product of its digits is 5832, while the sum is 26.

Adding to 33221333312 its reverse (21333312233), we get a palindrome (54554645545).

The spelling of 33221333312 in words is "thirty-three billion, two hundred twenty-one million, three hundred thirty-three thousand, three hundred twelve".