21202200102221 has 8 divisors (see below), whose sum is σ = 21504540991104. Its totient is φ = 20899962501040.

The previous prime is 21202200102199. The next prime is 21202200102401. The reversal of 21202200102221 is 12220100220212.

It is a happy number.

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 21202200102221 - 2³⁰ = 21201126360397 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 21202200102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202200402221) 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 7 ways as a sum of consecutive naturals, for example, 25408406 + ... + 26229591.

It is an arithmetic number, because the mean of its divisors is an integer number (2688067623888).

Almost surely, 2^{21202200102221} is an apocalyptic number.

It is an amenable number.

21202200102221 is a deficient number, since it is larger than the sum of its proper divisors (302340888883).

21202200102221 is an equidigital number, since it uses as much as digits as its factorization.

21202200102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51643851.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21202200102221 its reverse (12220100220212), we get a palindrome (33422300322433).

The spelling of 21202200102221 in words is "twenty-one trillion, two hundred two billion, two hundred million, one hundred two thousand, two hundred twenty-one".