12112101122212 has 288 divisors, whose sum is σ = 27809614103040. Its totient is φ = 4570601333760.

The previous prime is 12112101122201. The next prime is 12112101122257. The reversal of 12112101122212 is 21222110121121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12112101122212.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2621097262 + ... + 2621101882.

It is an arithmetic number, because the mean of its divisors is an integer number (96561160080).

Almost surely, 2^{12112101122212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12112101122212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13904807051520).

12112101122212 is an abundant number, since it is smaller than the sum of its proper divisors (15697512980828).

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

12112101122212 is a wasteful number, since it uses less digits than its factorization.

12112101122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5251 (or 5242 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12112101122212 its reverse (21222110121121), we get a palindrome (33334211243333).

The spelling of 12112101122212 in words is "twelve trillion, one hundred twelve billion, one hundred one million, one hundred twenty-two thousand, two hundred twelve".