210111200021100 has 432 divisors, whose sum is σ = 714296237114880. Its totient is φ = 47541912768000.

The previous prime is 210111200021089. The next prime is 210111200021101. The reversal of 210111200021100 is 1120002111012.

210111200021100 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 (210111200021101) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 16745925027 + ... + 16745937573.

It is an arithmetic number, because the mean of its divisors is an integer number (1653463511840).

Almost surely, 2^{210111200021100} is an apocalyptic number.

210111200021100 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 210111200021100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357148118557440).

210111200021100 is an abundant number, since it is smaller than the sum of its proper divisors (504185037093780).

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

210111200021100 is a wasteful number, since it uses less digits than its factorization.

210111200021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23958 (or 23944 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 210111200021100 its reverse (1120002111012), we get a palindrome (211231202132112).

The spelling of 210111200021100 in words is "two hundred ten trillion, one hundred eleven billion, two hundred million, twenty-one thousand, one hundred".