221010111222 has 16 divisors (see below), whose sum is σ = 457262299440. Its totient is φ = 71129690912.

The previous prime is 221010111211. The next prime is 221010111227. The reversal of 221010111222 is 222111010122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221010111227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635086353 + ... + 635086700.

It is an arithmetic number, because the mean of its divisors is an integer number (28578893715).

Almost surely, 2^221010111222 is an apocalyptic number.

221010111222 is an abundant number, since it is smaller than the sum of its proper divisors (236252188218).

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

221010111222 is a wasteful number, since it uses less digits than its factorization.

221010111222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270173087.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221010111222 its reverse (222111010122), we get a palindrome (443121121344).

The spelling of 221010111222 in words is "two hundred twenty-one billion, ten million, one hundred eleven thousand, two hundred twenty-two".