12012105818 has 16 divisors (see below), whose sum is σ = 18397510560. Its totient is φ = 5880088656.

The previous prime is 12012105817. The next prime is 12012105821. The reversal of 12012105818 is 81850121021.

It is not an unprimeable number, because it can be changed into a prime (12012105811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71828 + ... + 170831.

It is an arithmetic number, because the mean of its divisors is an integer number (1149844410).

Almost surely, 2^12012105818 is an apocalyptic number.

12012105818 is a deficient number, since it is larger than the sum of its proper divisors (6385404742).

12012105818 is a wasteful number, since it uses less digits than its factorization.

12012105818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243181.

The product of its (nonzero) digits is 1280, while the sum is 29.

Adding to 12012105818 its reverse (81850121021), we get a palindrome (93862226839).

The spelling of 12012105818 in words is "twelve billion, twelve million, one hundred five thousand, eight hundred eighteen".