12112012111 has 8 divisors (see below), whose sum is σ = 12323475200. Its totient is φ = 11902002840.

The previous prime is 12112012067. The next prime is 12112012177. The reversal of 12112012111 is 11121021121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12112012111 - 2²¹ = 12109914959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12112012091 and 12112012100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112012711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346641 + ... + 379978.

It is an arithmetic number, because the mean of its divisors is an integer number (1540434400).

Almost surely, 2^12112012111 is an apocalyptic number.

12112012111 is a deficient number, since it is larger than the sum of its proper divisors (211463089).

12112012111 is an equidigital number, since it uses as much as digits as its factorization.

12112012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726909.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12112012111 its reverse (11121021121), we get a palindrome (23233033232).

The spelling of 12112012111 in words is "twelve billion, one hundred twelve million, twelve thousand, one hundred eleven".