12122122222 has 16 divisors (see below), whose sum is σ = 20782333440. Its totient is φ = 5194807128.

The previous prime is 12122122183. The next prime is 12122122223. The reversal of 12122122222 is 22222122121.

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 12122122222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122122223) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 241983 + ... + 287749.

It is an arithmetic number, because the mean of its divisors is an integer number (1298895840).

Almost surely, 2^12122122222 is an apocalyptic number.

12122122222 is a deficient number, since it is larger than the sum of its proper divisors (8660211218).

12122122222 is a wasteful number, since it uses less digits than its factorization.

12122122222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64695.

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

Adding to 12122122222 its reverse (22222122121), we get a palindrome (34344244343).

The spelling of 12122122222 in words is "twelve billion, one hundred twenty-two million, one hundred twenty-two thousand, two hundred twenty-two".