12111221201112 has 192 divisors, whose sum is σ = 37892480464800. Its totient is φ = 3453776363520.

The previous prime is 12111221201077. The next prime is 12111221201147. The reversal of 12111221201112 is 21110212211121.

It is a happy number.

12111221201112 is a `hidden beast` number, since 121 + 11 + 221 + 201 + 112 = 666.

It is an interprime number because it is at equal distance from previous prime (12111221201077) and next prime (12111221201147).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 126203964 + ... + 126299892.

Almost surely, 2^{12111221201112} is an apocalyptic number.

12111221201112 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 12111221201112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18946240232400).

12111221201112 is an abundant number, since it is smaller than the sum of its proper divisors (25781259263688).

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

12111221201112 is a wasteful number, since it uses less digits than its factorization.

12111221201112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105346 (or 105339 counting only the distinct ones).

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

Adding to 12111221201112 its reverse (21110212211121), we get a palindrome (33221433412233).

The spelling of 12111221201112 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-one million, two hundred one thousand, one hundred twelve".