2110101210221 has 4 divisors (see below), whose sum is σ = 2110779920700. Its totient is φ = 2109422499744.

The previous prime is 2110101210157. The next prime is 2110101210241. The reversal of 2110101210221 is 1220121010112.

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 330465169321 + 1779636040900 = 574861^2 + 1334030^2 .

It is a cyclic number.

It is not a de Polignac number, because 2110101210221 - 2⁶ = 2110101210157 is a prime.

It is a super-2 number, since 2×2110101210221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2110101210196 and 2110101210205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2110101210241) 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, 339350576 + ... + 339356793.

It is an arithmetic number, because the mean of its divisors is an integer number (527694980175).

Almost surely, 2^{2110101210221} is an apocalyptic number.

It is an amenable number.

2110101210221 is a deficient number, since it is larger than the sum of its proper divisors (678710479).

2110101210221 is an equidigital number, since it uses as much as digits as its factorization.

2110101210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678710478.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2110101210221 its reverse (1220121010112), we get a palindrome (3330222220333).

The spelling of 2110101210221 in words is "two trillion, one hundred ten billion, one hundred one million, two hundred ten thousand, two hundred twenty-one".