21102222013221 has 8 divisors (see below), whose sum is σ = 28136318958720. Its totient is φ = 14068136538272.

The previous prime is 21102222013219. The next prime is 21102222013261. The reversal of 21102222013221 is 12231022220112.

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 21102222013221 - 2¹ = 21102222013219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102222013261) 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, 3352225 + ... + 7310393.

It is an arithmetic number, because the mean of its divisors is an integer number (3517039869840).

Almost surely, 2^{21102222013221} is an apocalyptic number.

It is an amenable number.

21102222013221 is a deficient number, since it is larger than the sum of its proper divisors (7034096945499).

21102222013221 is a wasteful number, since it uses less digits than its factorization.

21102222013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5735275.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21102222013221 its reverse (12231022220112), we get a palindrome (33333244233333).

The spelling of 21102222013221 in words is "twenty-one trillion, one hundred two billion, two hundred twenty-two million, thirteen thousand, two hundred twenty-one".