12113111 has 4 divisors (see below), whose sum is σ = 12639792. Its totient is φ = 11586432.

The previous prime is 12113093. The next prime is 12113117. The reversal of 12113111 is 11131121.

It is a happy number.

12113111 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11131121 = 601 ⋅18521.

It is a cyclic number.

It is not a de Polignac number, because 12113111 - 2⁶ = 12113047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12113092 and 12113101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12113117) 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, 263306 + ... + 263351.

It is an arithmetic number, because the mean of its divisors is an integer number (3159948).

Almost surely, 2^12113111 is an apocalyptic number.

12113111 is a deficient number, since it is larger than the sum of its proper divisors (526681).

12113111 is an equidigital number, since it uses as much as digits as its factorization.

12113111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526680.

The product of its digits is 6, while the sum is 11.

The square root of 12113111 is about 3480.3894896980. The cubic root of 12113111 is about 229.6599322213.

Adding to 12113111 its reverse (11131121), we get a palindrome (23244232).

It can be divided in two parts, 1 and 2113111, that added together give a palindrome (2113112).

The spelling of 12113111 in words is "twelve million, one hundred thirteen thousand, one hundred eleven".