22231222213221 has 24 divisors (see below), whose sum is σ = 36795992076480. Its totient is φ = 12670036920576.

The previous prime is 22231222213183. The next prime is 22231222213241. The reversal of 22231222213221 is 12231222213222.

22231222213221 is a `hidden beast` number, since 2 + 2 + 2 + 3 + 1 + 222 + 213 + 221 = 666.

It is not a de Polignac number, because 22231222213221 - 2¹¹ = 22231222211173 is a prime.

It is a super-2 number, since 2×22231222213221² (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 (22231222213241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 465512460 + ... + 465560213.

It is an arithmetic number, because the mean of its divisors is an integer number (1533166336520).

Almost surely, 2^{22231222213221} is an apocalyptic number.

22231222213221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22231222213221 is a deficient number, since it is larger than the sum of its proper divisors (14564769863259).

22231222213221 is a wasteful number, since it uses less digits than its factorization.

22231222213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931073065 (or 931073062 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 22231222213221 its reverse (12231222213222), we get a palindrome (34462444426443).

Subtracting from 22231222213221 its reverse (12231222213222), we obtain a palindrome (9999999999999).

The spelling of 22231222213221 in words is "twenty-two trillion, two hundred thirty-one billion, two hundred twenty-two million, two hundred thirteen thousand, two hundred twenty-one".