21002002033200 has 240 divisors, whose sum is σ = 67499345586816. Its totient is φ = 5581985587200.

The previous prime is 21002002033193. The next prime is 21002002033217. The reversal of 21002002033200 is 233020020012.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21002002033200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2044383264 + ... + 2044393536.

Almost surely, 2^{21002002033200} is an apocalyptic number.

21002002033200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21002002033200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33749672793408).

21002002033200 is an abundant number, since it is smaller than the sum of its proper divisors (46497343553616).

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

21002002033200 is a wasteful number, since it uses less digits than its factorization.

21002002033200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15772 (or 15761 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 21002002033200 its reverse (233020020012), we get a palindrome (21235022053212).

The spelling of 21002002033200 in words is "twenty-one trillion, two billion, two million, thirty-three thousand, two hundred".