21022102110221 has 8 divisors (see below), whose sum is σ = 21373361993280. Its totient is φ = 20671945085088.

The previous prime is 21022102110211. The next prime is 21022102110239. The reversal of 21022102110221 is 12201120122012.

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 21022102110221 - 2³⁰ = 21021028368397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21022102110221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022102110211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275676041 + ... + 275752286.

It is an arithmetic number, because the mean of its divisors is an integer number (2671670249160).

Almost surely, 2^{21022102110221} is an apocalyptic number.

It is an amenable number.

21022102110221 is a deficient number, since it is larger than the sum of its proper divisors (351259883059).

21022102110221 is an equidigital number, since it uses as much as digits as its factorization.

21022102110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551428963.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21022102110221 its reverse (12201120122012), we get a palindrome (33223222232233).

The spelling of 21022102110221 in words is "twenty-one trillion, twenty-two billion, one hundred two million, one hundred ten thousand, two hundred twenty-one".