221222222224 has 60 divisors (see below), whose sum is σ = 457597961856. Its totient is φ = 103550641216.

The previous prime is 221222222209. The next prime is 221222222233. The reversal of 221222222224 is 422222222122.

221222222224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 119757 + ... + 675859.

Almost surely, 2^221222222224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221222222224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228798980928).

221222222224 is an abundant number, since it is smaller than the sum of its proper divisors (236375739632).

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

221222222224 is a wasteful number, since it uses less digits than its factorization.

221222222224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556204 (or 556175 counting only the distinct ones).

The product of its digits is 4096, while the sum is 25.

Adding to 221222222224 its reverse (422222222122), we get a palindrome (643444444346).

The spelling of 221222222224 in words is "two hundred twenty-one billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-four".