12122122 has 8 divisors (see below), whose sum is σ = 19252836. Its totient is φ = 5704512.

The previous prime is 12122119. The next prime is 12122153. The reversal of 12122122 is 22122121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12117361 + 4761 = 3481^2 + 69^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178233 + ... + 178300.

Almost surely, 2^12122122 is an apocalyptic number.

12122122 is a deficient number, since it is larger than the sum of its proper divisors (7130714).

12122122 is a wasteful number, since it uses less digits than its factorization.

12122122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356552.

The product of its digits is 32, while the sum is 13.

The square root of 12122122 is about 3481.6837880543. The cubic root of 12122122 is about 229.7168664721.

Adding to 12122122 its reverse (22122121), we get a palindrome (34244243).

Subtracting 12122122 from its reverse (22122121), we obtain a palindrome (9999999).

It can be divided in two parts, 121 and 22122, that multiplied together give a palindrome (2676762).

The spelling of 12122122 in words is "twelve million, one hundred twenty-two thousand, one hundred twenty-two".