221120210000 has 200 divisors, whose sum is σ = 559680844800. Its totient is φ = 84502080000.

The previous prime is 221120209963. The next prime is 221120210011. The reversal of 221120210000 is 12021122.

It is a happy number.

221120210000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (200).

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 24485486 + ... + 24494514.

It is an arithmetic number, because the mean of its divisors is an integer number (2798404224).

Almost surely, 2^221120210000 is an apocalyptic number.

221120210000 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 221120210000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279840422400).

221120210000 is an abundant number, since it is smaller than the sum of its proper divisors (338560634800).

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

221120210000 is an equidigital number, since it uses as much as digits as its factorization.

221120210000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9167 (or 9146 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 221120210000 its reverse (12021122), we get a palindrome (221132231122).

The spelling of 221120210000 in words is "two hundred twenty-one billion, one hundred twenty million, two hundred ten thousand".