221222112232 has 64 divisors (see below), whose sum is σ = 457070169600. Its totient is φ = 99541275840.

The previous prime is 221222112229. The next prime is 221222112289. The reversal of 221222112232 is 232211222122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13729893 + ... + 13745995.

It is an arithmetic number, because the mean of its divisors is an integer number (7141721400).

Almost surely, 2^221222112232 is an apocalyptic number.

221222112232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221222112232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228535084800).

221222112232 is an abundant number, since it is smaller than the sum of its proper divisors (235848057368).

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

221222112232 is a wasteful number, since it uses less digits than its factorization.

221222112232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17686 (or 17682 counting only the distinct ones).

The product of its digits is 768, while the sum is 22.

Adding to 221222112232 its reverse (232211222122), we get a palindrome (453433334354).

The spelling of 221222112232 in words is "two hundred twenty-one billion, two hundred twenty-two million, one hundred twelve thousand, two hundred thirty-two".