12112122111 has 8 divisors (see below), whose sum is σ = 16157781504. Its totient is φ = 8070605400.

The previous prime is 12112122103. The next prime is 12112122131. The reversal of 12112122111 is 11122121121.

It is a happy number.

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

It is not a de Polignac number, because 12112122111 - 2³ = 12112122103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112122131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1028841 + ... + 1040546.

It is an arithmetic number, because the mean of its divisors is an integer number (2019722688).

Almost surely, 2^12112122111 is an apocalyptic number.

12112122111 is a deficient number, since it is larger than the sum of its proper divisors (4045659393).

12112122111 is a wasteful number, since it uses less digits than its factorization.

12112122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2071341.

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

Adding to 12112122111 its reverse (11122121121), we get a palindrome (23234243232).

The spelling of 12112122111 in words is "twelve billion, one hundred twelve million, one hundred twenty-two thousand, one hundred eleven".