12101112 has 24 divisors (see below), whose sum is σ = 32774040. Its totient is φ = 4033680.

The previous prime is 12101099. The next prime is 12101123. The reversal of 12101112 is 21110121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 12101094 and 12101103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83964 + ... + 84107.

It is an arithmetic number, because the mean of its divisors is an integer number (1365585).

Almost surely, 2^12101112 is an apocalyptic number.

12101112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12101112 is an abundant number, since it is smaller than the sum of its proper divisors (20672928).

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

12101112 is a wasteful number, since it uses less digits than its factorization.

12101112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168083 (or 168076 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 12101112 is about 3478.6652612748. The cubic root of 12101112 is about 229.5840750244.

Adding to 12101112 its reverse (21110121), we get a palindrome (33211233).

Subtracting 12101112 from its reverse (21110121), we obtain a palindrome (9009009).

It can be divided in two parts, 12 and 101112, that added together give a square (101124 = 318²).

The spelling of 12101112 in words is "twelve million, one hundred one thousand, one hundred twelve".