33221002100 has 144 divisors (see below), whose sum is σ = 85002267840. Its totient is φ = 11110348800.

The previous prime is 33221002079. The next prime is 33221002153. The reversal of 33221002100 is 120012233.

It is a happy number.

It is a super-2 number, since 2×33221002100² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4042796 + ... + 4051004.

Almost surely, 2^33221002100 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 33221002100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42501133920).

33221002100 is an abundant number, since it is smaller than the sum of its proper divisors (51781265740).

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

33221002100 is a wasteful number, since it uses less digits than its factorization.

33221002100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8530 (or 8523 counting only the distinct ones).

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

Adding to 33221002100 its reverse (120012233), we get a palindrome (33341014333).

The spelling of 33221002100 in words is "thirty-three billion, two hundred twenty-one million, two thousand, one hundred".