210221221111 has 8 divisors (see below), whose sum is σ = 242822373264. Its totient is φ = 179868424320.

The previous prime is 210221221079. The next prime is 210221221141. The reversal of 210221221111 is 111122122012.

210221221111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210221221111 - 2⁵ = 210221221079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210221221141) 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 7 ways as a sum of consecutive naturals, for example, 562088640 + ... + 562089013.

It is an arithmetic number, because the mean of its divisors is an integer number (30352796658).

Almost surely, 2^210221221111 is an apocalyptic number.

210221221111 is a deficient number, since it is larger than the sum of its proper divisors (32601152153).

210221221111 is a wasteful number, since it uses less digits than its factorization.

210221221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124177681.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 210221221111 its reverse (111122122012), we get a palindrome (321343343123).

Subtracting from 210221221111 its reverse (111122122012), we obtain a palindrome (99099099099).

The spelling of 210221221111 in words is "two hundred ten billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred eleven".