12040111 has 4 divisors (see below), whose sum is σ = 12059824. Its totient is φ = 12020400.

The previous prime is 12040099. The next prime is 12040123. The reversal of 12040111 is 11104021.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (12040099) and next prime (12040123).

It is a cyclic number.

It is not a de Polignac number, because 12040111 - 2¹⁷ = 11909039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12040141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8910 + ... + 10171.

It is an arithmetic number, because the mean of its divisors is an integer number (3014956).

Almost surely, 2^12040111 is an apocalyptic number.

12040111 is a deficient number, since it is larger than the sum of its proper divisors (19713).

12040111 is an equidigital number, since it uses as much as digits as its factorization.

12040111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19712.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 12040111 is about 3469.8863093767. The cubic root of 12040111 is about 229.1976516708.

Adding to 12040111 its reverse (11104021), we get a palindrome (23144132).

The spelling of 12040111 in words is "twelve million, forty thousand, one hundred eleven".