21241203200 has 120 divisors (see below), whose sum is σ = 60145099872. Its totient is φ = 7282667520.

The previous prime is 21241203199. The next prime is 21241203227. The reversal of 21241203200 is 230214212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28934 + ... + 208133.

Almost surely, 2^21241203200 is an apocalyptic number.

21241203200 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 21241203200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30072549936).

21241203200 is an abundant number, since it is smaller than the sum of its proper divisors (38903896672).

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

21241203200 is an equidigital number, since it uses as much as digits as its factorization.

21241203200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237102 (or 237081 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21241203200 its reverse (230214212), we get a palindrome (21471417412).

The spelling of 21241203200 in words is "twenty-one billion, two hundred forty-one million, two hundred three thousand, two hundred".