21334210303221 has 24 divisors (see below), whose sum is σ = 31928438070360. Its totient is φ = 13710941798400.

The previous prime is 21334210303151. The next prime is 21334210303229. The reversal of 21334210303221 is 12230301243312.

21334210303221 is a `hidden beast` number, since 2 + 1 + 3 + 342 + 10 + 303 + 2 + 2 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 15238397442321 + 6095812860900 = 3903639^2 + 2468970^2 .

It is a de Polignac number, because none of the positive numbers 2^k-21334210303221 is a prime.

It is a super-2 number, since 2×21334210303221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21334210303229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63592660 + ... + 63927261.

It is an arithmetic number, because the mean of its divisors is an integer number (1330351586265).

Almost surely, 2^{21334210303221} is an apocalyptic number.

It is an amenable number.

21334210303221 is a deficient number, since it is larger than the sum of its proper divisors (10594227767139).

21334210303221 is a wasteful number, since it uses less digits than its factorization.

21334210303221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127520597 (or 127520594 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 21334210303221 its reverse (12230301243312), we get a palindrome (33564511546533).

The spelling of 21334210303221 in words is "twenty-one trillion, three hundred thirty-four billion, two hundred ten million, three hundred three thousand, two hundred twenty-one".