12112102111212 has 72 divisors (see below), whose sum is σ = 31348717976576. Its totient is φ = 3940957740384.

The previous prime is 12112102111201. The next prime is 12112102111237. The reversal of 12112102111212 is 21211120121121.

It is a happy number.

12112102111212 is a `hidden beast` number, since 1 + 211 + 210 + 21 + 11 + 212 = 666.

It is a super-2 number, since 2×12112102111212² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70888 + ... + 4922319.

Almost surely, 2^{12112102111212} is an apocalyptic number.

12112102111212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12112102111212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15674358988288).

12112102111212 is an abundant number, since it is smaller than the sum of its proper divisors (19236615865364).

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

12112102111212 is a wasteful number, since it uses less digits than its factorization.

12112102111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4994827 (or 4994822 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 12112102111212 its reverse (21211120121121), we get a palindrome (33323222232333).

The spelling of 12112102111212 in words is "twelve trillion, one hundred twelve billion, one hundred two million, one hundred eleven thousand, two hundred twelve".