210100201221 has 16 divisors (see below), whose sum is σ = 282181383680. Its totient is φ = 139043142000.

The previous prime is 210100201219. The next prime is 210100201231. The reversal of 210100201221 is 122102001012.

210100201221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 210100201221 - 2¹ = 210100201219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210100201197 and 210100201206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210100201231) 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 15 ways as a sum of consecutive naturals, for example, 4422846 + ... + 4470096.

It is an arithmetic number, because the mean of its divisors is an integer number (17636336480).

Almost surely, 2^210100201221 is an apocalyptic number.

It is an amenable number.

210100201221 is a deficient number, since it is larger than the sum of its proper divisors (72081182459).

210100201221 is a wasteful number, since it uses less digits than its factorization.

210100201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58056.

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

Adding to 210100201221 its reverse (122102001012), we get a palindrome (332202202233).

The spelling of 210100201221 in words is "two hundred ten billion, one hundred million, two hundred one thousand, two hundred twenty-one".