21221020233222 has 64 divisors (see below), whose sum is σ = 43332204165120. Its totient is φ = 6925876214400.

The previous prime is 21221020233167. The next prime is 21221020233233. The reversal of 21221020233222 is 22233202012212.

It is a junction number, because it is equal to n+sod(n) for n = 21221020233192 and 21221020233201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 393253479 + ... + 393307437.

It is an arithmetic number, because the mean of its divisors is an integer number (677065690080).

Almost surely, 2^{21221020233222} is an apocalyptic number.

21221020233222 is an abundant number, since it is smaller than the sum of its proper divisors (22111183931898).

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

21221020233222 is a wasteful number, since it uses less digits than its factorization.

21221020233222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56549.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21221020233222 its reverse (22233202012212), we get a palindrome (43454222245434).

The spelling of 21221020233222 in words is "twenty-one trillion, two hundred twenty-one billion, twenty million, two hundred thirty-three thousand, two hundred twenty-two".