12112112221222 has 32 divisors (see below), whose sum is σ = 19856367780480. Its totient is φ = 5507470350720.

The previous prime is 12112112221133. The next prime is 12112112221289. The reversal of 12112112221222 is 22212221121121.

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 = 12112112221193 and 12112112221202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5448813 + ... + 7342600.

It is an arithmetic number, because the mean of its divisors is an integer number (620511493140).

Almost surely, 2^{12112112221222} is an apocalyptic number.

12112112221222 is a deficient number, since it is larger than the sum of its proper divisors (7744255559258).

12112112221222 is a wasteful number, since it uses less digits than its factorization.

12112112221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12791968.

The product of its digits is 256, while the sum is 22.

Adding to 12112112221222 its reverse (22212221121121), we get a palindrome (34324333342343).

The spelling of 12112112221222 in words is "twelve trillion, one hundred twelve billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twenty-two".