210211102221 has 16 divisors (see below), whose sum is σ = 286333363200. Its totient is φ = 137116631088.

The previous prime is 210211102187. The next prime is 210211102247. The reversal of 210211102221 is 122201112012.

It is not a de Polignac number, because 210211102221 - 2¹⁹ = 210210577933 is a prime.

It is a super-2 number, since 2×210211102221² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 210211102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210211102261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230790 + ... + 688248.

It is an arithmetic number, because the mean of its divisors is an integer number (17895835200).

Almost surely, 2^210211102221 is an apocalyptic number.

It is an amenable number.

210211102221 is a deficient number, since it is larger than the sum of its proper divisors (76122260979).

210211102221 is a wasteful number, since it uses less digits than its factorization.

210211102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460768.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210211102221 its reverse (122201112012), we get a palindrome (332412214233).

The spelling of 210211102221 in words is "two hundred ten billion, two hundred eleven million, one hundred two thousand, two hundred twenty-one".