12018111 has 16 divisors (see below), whose sum is σ = 18905088. Its totient is φ = 6645600.

The previous prime is 12018107. The next prime is 12018163. The reversal of 12018111 is 11181021.

It is not a de Polignac number, because 12018111 - 2² = 12018107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12018101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8580 + ... + 9881.

It is an arithmetic number, because the mean of its divisors is an integer number (1181568).

Almost surely, 2^12018111 is an apocalyptic number.

12018111 is a deficient number, since it is larger than the sum of its proper divisors (6886977).

12018111 is a wasteful number, since it uses less digits than its factorization.

12018111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18502.

The product of its (nonzero) digits is 16, while the sum is 15.

The square root of 12018111 is about 3466.7147272310. The cubic root of 12018111 is about 229.0579679468.

Adding to 12018111 its reverse (11181021), we get a palindrome (23199132).

The spelling of 12018111 in words is "twelve million, eighteen thousand, one hundred eleven".