12111111110 has 32 divisors (see below), whose sum is σ = 24919133760. Its totient is φ = 4151572992.

The previous prime is 12111111101. The next prime is 12111111113. The reversal of 12111111110 is 1111111121.

It is a happy number.

12111111110 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12111111091 and 12111111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111111113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 429362 + ... + 456698.

It is an arithmetic number, because the mean of its divisors is an integer number (778722930).

Almost surely, 2^12111111110 is an apocalyptic number.

12111111110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12111111110 is an abundant number, since it is smaller than the sum of its proper divisors (12808022650).

12111111110 is a wasteful number, since it uses less digits than its factorization.

12111111110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33680.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 12111111110 its sum of digits (11), we get a palindrome (12111111121).

Adding to 12111111110 its reverse (1111111121), we get a palindrome (13222222231).

It can be divided in two parts, 121111111 and 10, that added together give a palindrome (121111121).

The spelling of 12111111110 in words is "twelve billion, one hundred eleven million, one hundred eleven thousand, one hundred ten".