12011210112 has 128 divisors (see below), whose sum is σ = 34885468800. Its totient is φ = 3631370240.

The previous prime is 12011210093. The next prime is 12011210117. The reversal of 12011210112 is 21101211021.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×12011210112² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011210117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1969564 + ... + 1975652.

It is an arithmetic number, because the mean of its divisors is an integer number (272542725).

Almost surely, 2^12011210112 is an apocalyptic number.

12011210112 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 12011210112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17442734400).

12011210112 is an abundant number, since it is smaller than the sum of its proper divisors (22874258688).

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

12011210112 is a wasteful number, since it uses less digits than its factorization.

12011210112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6584 (or 6572 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12011210112 its reverse (21101211021), we get a palindrome (33112421133).

Subtracting 12011210112 from its reverse (21101211021), we obtain a palindrome (9090000909).

The spelling of 12011210112 in words is "twelve billion, eleven million, two hundred ten thousand, one hundred twelve".