12111201105 has 32 divisors (see below), whose sum is σ = 19758366720. Its totient is φ = 6333071040.

The previous prime is 12111201073. The next prime is 12111201119. The reversal of 12111201105 is 50110211121.

It is not a de Polignac number, because 12111201105 - 2⁵ = 12111201073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 321090 + ... + 356820.

It is an arithmetic number, because the mean of its divisors is an integer number (617448960).

Almost surely, 2^12111201105 is an apocalyptic number.

12111201105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12111201105 is a deficient number, since it is larger than the sum of its proper divisors (7647165615).

12111201105 is a wasteful number, since it uses less digits than its factorization.

12111201105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36181.

The product of its (nonzero) digits is 20, while the sum is 15.

Adding to 12111201105 its reverse (50110211121), we get a palindrome (62221412226).

The spelling of 12111201105 in words is "twelve billion, one hundred eleven million, two hundred one thousand, one hundred five".