210110110021 has 12 divisors (see below), whose sum is σ = 244911617280. Its totient is φ = 179727568440.

The previous prime is 210110110009. The next prime is 210110110033. The reversal of 210110110021 is 120011011012.

210110110021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (210110110009) and next prime (210110110033).

It is not a de Polignac number, because 210110110021 - 2²¹ = 210108012869 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 (210110114021) 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 11 ways as a sum of consecutive naturals, for example, 4342501 + ... + 4390618.

It is an arithmetic number, because the mean of its divisors is an integer number (20409301440).

Almost surely, 2^210110110021 is an apocalyptic number.

It is an amenable number.

210110110021 is a deficient number, since it is larger than the sum of its proper divisors (34801507259).

210110110021 is an equidigital number, since it uses as much as digits as its factorization.

210110110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8733624 (or 8733617 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 210110110021 its reverse (120011011012), we get a palindrome (330121121033).

Subtracting from 210110110021 its reverse (120011011012), we obtain a palindrome (90099099009).

The spelling of 210110110021 in words is "two hundred ten billion, one hundred ten million, one hundred ten thousand, twenty-one".