33221000000 has 196 divisors, whose sum is σ = 83342683200. Its totient is φ = 13137600000.

The previous prime is 33220999957. The next prime is 33221000003. The reversal of 33221000000 is 12233.

It is a super-2 number, since 2×33221000000² (a number of 22 digits) contains 22 as substring.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33221000003) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 138999881 + ... + 139000119.

Almost surely, 2^33221000000 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 33221000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41671341600).

33221000000 is an abundant number, since it is smaller than the sum of its proper divisors (50121683200).

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

33221000000 is an frugal number, since it uses more digits than its factorization.

33221000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420 (or 385 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 11.

Adding to 33221000000 its reverse (12233), we get a palindrome (33221012233).

The spelling of 33221000000 in words is "thirty-three billion, two hundred twenty-one million", and thus it is an aban number.