210221110112100 has 72 divisors (see below), whose sum is σ = 614510258180448. Its totient is φ = 55481035238400.

The previous prime is 210221110112047. The next prime is 210221110112129. The reversal of 210221110112100 is 1211011122012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 210221110112100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3612017466 + ... + 3612075665.

Almost surely, 2^{210221110112100} is an apocalyptic number.

210221110112100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210221110112100 is an abundant number, since it is smaller than the sum of its proper divisors (404289148068348).

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

210221110112100 is a wasteful number, since it uses less digits than its factorization.

210221110112100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7224093245 (or 7224093238 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 210221110112100 its reverse (1211011122012), we get a palindrome (211432121234112).

The spelling of 210221110112100 in words is "two hundred ten trillion, two hundred twenty-one billion, one hundred ten million, one hundred twelve thousand, one hundred".