12011112212112 has 200 divisors, whose sum is σ = 37518653346944. Its totient is φ = 3687742308096.

The previous prime is 12011112212083. The next prime is 12011112212147. The reversal of 12011112212112 is 21121221111021.

It is a happy number.

12011112212112 is a `hidden beast` number, since 120 + 1 + 111 + 221 + 211 + 2 = 666.

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 39 ways as a sum of consecutive naturals, for example, 7030743 + ... + 8570505.

Almost surely, 2^{12011112212112} is an apocalyptic number.

12011112212112 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 12011112212112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18759326673472).

12011112212112 is an abundant number, since it is smaller than the sum of its proper divisors (25507541134832).

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

12011112212112 is a wasteful number, since it uses less digits than its factorization.

12011112212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540259 (or 1540244 counting only the distinct ones).

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

Adding to 12011112212112 its reverse (21121221111021), we get a palindrome (33132333323133).

The spelling of 12011112212112 in words is "twelve trillion, eleven billion, one hundred twelve million, two hundred twelve thousand, one hundred twelve".