12111221000112 has 160 divisors (see below), whose sum is σ = 34199320436736. Its totient is φ = 3671024716800.

The previous prime is 12111220999987. The next prime is 12111221000117. The reversal of 12111221000112 is 21100012211121.

It is a happy number.

It is a super-2 number, since 2×12111221000112² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12111221000091 and 12111221000100.

It is not an unprimeable number, because it can be changed into a prime (12111221000117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11782662 + ... + 12769242.

Almost surely, 2^{12111221000112} is an apocalyptic number.

12111221000112 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 12111221000112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17099660218368).

12111221000112 is an abundant number, since it is smaller than the sum of its proper divisors (22088099436624).

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

12111221000112 is a wasteful number, since it uses less digits than its factorization.

12111221000112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986899 (or 986893 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12111221000112 its reverse (21100012211121), we get a palindrome (33211233211233).

The spelling of 12111221000112 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-one million, one hundred twelve", and thus it is an aban number.