12112122 has 64 divisors (see below), whose sum is σ = 28200960. Its totient is φ = 3432000.

The previous prime is 12112069. The next prime is 12112127. The reversal of 12112122 is 22121121.

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

It is a junction number, because it is equal to n+sod(n) for n = 12112098 and 12112107.

It is not an unprimeable number, because it can be changed into a prime (12112127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119872 + ... + 119972.

It is an arithmetic number, because the mean of its divisors is an integer number (440640).

Almost surely, 2^12112122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12112122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14100480).

12112122 is an abundant number, since it is smaller than the sum of its proper divisors (16088838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12112122 is a wasteful number, since it uses less digits than its factorization.

12112122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219.

The product of its digits is 16, while the sum is 12.

The square root of 12112122 is about 3480.2474049987. The cubic root of 12112122 is about 229.6536816978.

Adding to 12112122 its reverse (22121121), we get a palindrome (34233243).

It can be divided in two parts, 121121 and 22, that multiplied together give a palindrome (2664662).

The spelling of 12112122 in words is "twelve million, one hundred twelve thousand, one hundred twenty-two".