21002200303200 has 144 divisors (see below), whose sum is σ = 69816676446720. Its totient is φ = 5481425297920.

The previous prime is 21002200303187. The next prime is 21002200303207. The reversal of 21002200303200 is 230300220012.

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 21002200303200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002200303207) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 92982060 + ... + 93207659.

It is an arithmetic number, because the mean of its divisors is an integer number (484838030880).

Almost surely, 2^{21002200303200} is an apocalyptic number.

21002200303200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21002200303200 is an abundant number, since it is smaller than the sum of its proper divisors (48814476143520).

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

21002200303200 is a wasteful number, since it uses less digits than its factorization.

21002200303200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186189789 (or 186189776 counting only the distinct ones).

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

Adding to 21002200303200 its reverse (230300220012), we get a palindrome (21232500523212).

The spelling of 21002200303200 in words is "twenty-one trillion, two billion, two hundred million, three hundred three thousand, two hundred".