12222211222 has 16 divisors (see below), whose sum is σ = 19745443872. Its totient is φ = 5640485760.

The previous prime is 12222211189. The next prime is 12222211237. The reversal of 12222211222 is 22211222221.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12222211222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431847 + ... + 459277.

It is an arithmetic number, because the mean of its divisors is an integer number (1234090242).

Almost surely, 2^12222211222 is an apocalyptic number.

12222211222 is a deficient number, since it is larger than the sum of its proper divisors (7523232650).

12222211222 is a wasteful number, since it uses less digits than its factorization.

12222211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44583.

The product of its digits is 256, while the sum is 19.

Adding to 12222211222 its reverse (22211222221), we get a palindrome (34433433443).

The spelling of 12222211222 in words is "twelve billion, two hundred twenty-two million, two hundred eleven thousand, two hundred twenty-two".