12221102222 has 64 divisors (see below), whose sum is σ = 22982279040. Its totient is φ = 4752384000.

The previous prime is 12221102221. The next prime is 12221102269. The reversal of 12221102222 is 22220112221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 12221102222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221102221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8978822 + ... + 8980182.

It is an arithmetic number, because the mean of its divisors is an integer number (359098110).

Almost surely, 2^12221102222 is an apocalyptic number.

12221102222 is a deficient number, since it is larger than the sum of its proper divisors (10761176818).

12221102222 is a wasteful number, since it uses less digits than its factorization.

12221102222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2717.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12221102222 its reverse (22220112221), we get a palindrome (34441214443).

Subtracting 12221102222 from its reverse (22220112221), we obtain a palindrome (9999009999).

The spelling of 12221102222 in words is "twelve billion, two hundred twenty-one million, one hundred two thousand, two hundred twenty-two".