12122222 has 16 divisors (see below), whose sum is σ = 20989152. Its totient is φ = 5143200.

The previous prime is 12122221. The next prime is 12122237. The reversal of 12122222 is 22222121.

It is a Harshad number since it is a multiple of its sum of digits (14).

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

12122222 is a modest number, since divided by 2222 gives 1212 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 12122197 and 12122206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2873 + ... + 5700.

It is an arithmetic number, because the mean of its divisors is an integer number (1311822).

Almost surely, 2^12122222 is an apocalyptic number.

12122222 is a deficient number, since it is larger than the sum of its proper divisors (8866930).

12122222 is a wasteful number, since it uses less digits than its factorization.

12122222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8683.

The product of its digits is 64, while the sum is 14.

The square root of 12122222 is about 3481.6981488923. The cubic root of 12122222 is about 229.7174981444.

Adding to 12122222 its reverse (22222121), we get a palindrome (34344343).

It can be divided in two parts, 121 and 22222, that multiplied together give a palindrome (2688862).

The spelling of 12122222 in words is "twelve million, one hundred twenty-two thousand, two hundred twenty-two".