210221202100 has 144 divisors (see below), whose sum is σ = 579564461056. Its totient is φ = 64385280000.

The previous prime is 210221202013. The next prime is 210221202179. The reversal of 210221202100 is 1202122012.

It is a happy number.

210221202100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (13).

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 47 ways as a sum of consecutive naturals, for example, 90501 + ... + 654700.

Almost surely, 2^210221202100 is an apocalyptic number.

210221202100 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 210221202100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289782230528).

210221202100 is an abundant number, since it is smaller than the sum of its proper divisors (369343258956).

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

210221202100 is a wasteful number, since it uses less digits than its factorization.

210221202100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745266 (or 745259 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 210221202100 its reverse (1202122012), we get a palindrome (211423324112).

The spelling of 210221202100 in words is "two hundred ten billion, two hundred twenty-one million, two hundred two thousand, one hundred".