210210110221 has 4 divisors (see below), whose sum is σ = 210307386844. Its totient is φ = 210112833600.

The previous prime is 210210110203. The next prime is 210210110249. The reversal of 210210110221 is 122011012012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 173351486025 + 36858624196 = 416355^2 + 191986^2 .

It is a cyclic number.

It is not a de Polignac number, because 210210110221 - 2¹⁹ = 210209585933 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 (210210110281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48635070 + ... + 48639391.

It is an arithmetic number, because the mean of its divisors is an integer number (52576846711).

Almost surely, 2^210210110221 is an apocalyptic number.

It is an amenable number.

210210110221 is a deficient number, since it is larger than the sum of its proper divisors (97276623).

210210110221 is an equidigital number, since it uses as much as digits as its factorization.

210210110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97276622.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 210210110221 its reverse (122011012012), we get a palindrome (332221122233).

The spelling of 210210110221 in words is "two hundred ten billion, two hundred ten million, one hundred ten thousand, two hundred twenty-one".