21232221102221 has 8 divisors (see below), whose sum is σ = 22099117378080. Its totient is φ = 20374308207792.

The previous prime is 21232221102187. The next prime is 21232221102223. The reversal of 21232221102221 is 12220112223212.

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 21232221102221 - 2¹⁴ = 21232221085837 is a prime.

It is a super-2 number, since 2×21232221102221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232221102223) 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 7 ways as a sum of consecutive naturals, for example, 2245840535 + ... + 2245849988.

It is an arithmetic number, because the mean of its divisors is an integer number (2762389672260).

Almost surely, 2^{21232221102221} is an apocalyptic number.

It is an amenable number.

21232221102221 is a deficient number, since it is larger than the sum of its proper divisors (866896275859).

21232221102221 is a wasteful number, since it uses less digits than its factorization.

21232221102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4491690715.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21232221102221 its reverse (12220112223212), we get a palindrome (33452333325433).

The spelling of 21232221102221 in words is "twenty-one trillion, two hundred thirty-two billion, two hundred twenty-one million, one hundred two thousand, two hundred twenty-one".