12185210112 has 144 divisors (see below), whose sum is σ = 35622504960. Its totient is φ = 3680557056.

The previous prime is 12185210047. The next prime is 12185210129. The reversal of 12185210112 is 21101258121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317463 + ... + 353769.

Almost surely, 2^12185210112 is an apocalyptic number.

12185210112 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 12185210112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17811252480).

12185210112 is an abundant number, since it is smaller than the sum of its proper divisors (23437294848).

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

12185210112 is a wasteful number, since it uses less digits than its factorization.

12185210112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36368 (or 36354 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 24.

Adding to 12185210112 its reverse (21101258121), we get a palindrome (33286468233).

The spelling of 12185210112 in words is "twelve billion, one hundred eighty-five million, two hundred ten thousand, one hundred twelve".