221222232330 has 128 divisors (see below), whose sum is σ = 613486089216. Its totient is φ = 50457216000.

The previous prime is 221222232317. The next prime is 221222232349. The reversal of 221222232330 is 33232222122.

It is a self number, because there is not a number n which added to its sum of digits gives 221222232330.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22451905 + ... + 22461755.

It is an arithmetic number, because the mean of its divisors is an integer number (4792860072).

Almost surely, 2^221222232330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221222232330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306743044608).

221222232330 is an abundant number, since it is smaller than the sum of its proper divisors (392263856886).

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

221222232330 is a wasteful number, since it uses less digits than its factorization.

221222232330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13892.

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 221222232330 its reverse (33232222122), we get a palindrome (254454454452).

The spelling of 221222232330 in words is "two hundred twenty-one billion, two hundred twenty-two million, two hundred thirty-two thousand, three hundred thirty".