210221201100 has 144 divisors (see below), whose sum is σ = 612630296096. Its totient is φ = 55655424000.

The previous prime is 210221201059. The next prime is 210221201101. The reversal of 210221201100 is 1102122012.

210221201100 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 (12).

It is not an unprimeable number, because it can be changed into a prime (210221201101) 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 47 ways as a sum of consecutive naturals, for example, 35889372 + ... + 35895228.

Almost surely, 2^210221201100 is an apocalyptic number.

210221201100 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 210221201100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306315148048).

210221201100 is an abundant number, since it is smaller than the sum of its proper divisors (402409094996).

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

210221201100 is a wasteful number, since it uses less digits than its factorization.

210221201100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6716 (or 6709 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 210221201100 its reverse (1102122012), we get a palindrome (211323323112).

The spelling of 210221201100 in words is "two hundred ten billion, two hundred twenty-one million, two hundred one thousand, one hundred".