12112011 has 10 divisors (see below), whose sum is σ = 18093372. Its totient is φ = 8074620.

The previous prime is 12111997. The next prime is 12112013. The reversal of 12112011 is 11021121.

It is a happy number.

It is not a de Polignac number, because 12112011 - 2⁹ = 12111499 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 12111984 and 12112002.

It is not an unprimeable number, because it can be changed into a prime (12112013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 74685 + ... + 74846.

Almost surely, 2^12112011 is an apocalyptic number.

12112011 is a deficient number, since it is larger than the sum of its proper divisors (5981361).

12112011 is an equidigital number, since it uses as much as digits as its factorization.

12112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149543 (or 149534 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 12112011 is about 3480.2314578200. The cubic root of 12112011 is about 229.6529801517.

Adding to 12112011 its reverse (11021121), we get a palindrome (23133132).

The spelling of 12112011 in words is "twelve million, one hundred twelve thousand, eleven".