21221352633222 has 192 divisors, whose sum is σ = 55091536281600. Its totient is φ = 5776012566720.

The previous prime is 21221352633167. The next prime is 21221352633223. The reversal of 21221352633222 is 22233625312212.

21221352633222 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 13 + 5 + 2 + 633 + 2 + 2 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221352633223) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 381795429 + ... + 381851007.

It is an arithmetic number, because the mean of its divisors is an integer number (286935084800).

Almost surely, 2^{21221352633222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21221352633222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27545768140800).

21221352633222 is an abundant number, since it is smaller than the sum of its proper divisors (33870183648378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21221352633222 is a wasteful number, since it uses less digits than its factorization.

21221352633222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57151 (or 57148 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

Adding to 21221352633222 its reverse (22233625312212), we get a palindrome (43454977945434).

The spelling of 21221352633222 in words is "twenty-one trillion, two hundred twenty-one billion, three hundred fifty-two million, six hundred thirty-three thousand, two hundred twenty-two".