12112112111 has 16 divisors (see below), whose sum is σ = 14288140800. Its totient is φ = 10142801280.

The previous prime is 12112112099. The next prime is 12112112119. The reversal of 12112112111 is 11121121121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12112112111 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 (12112112119) 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 15 ways as a sum of consecutive naturals, for example, 680261 + ... + 697838.

It is an arithmetic number, because the mean of its divisors is an integer number (893008800).

Almost surely, 2^12112112111 is an apocalyptic number.

12112112111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12112112111 is a deficient number, since it is larger than the sum of its proper divisors (2176028689).

12112112111 is a wasteful number, since it uses less digits than its factorization.

12112112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378174.

The product of its digits is 8, while the sum is 14.

Adding to 12112112111 its reverse (11121121121), we get a palindrome (23233233232).

It can be divided in two parts, 121121121 and 11, that multiplied together give a palindrome (1332332331).

The spelling of 12112112111 in words is "twelve billion, one hundred twelve million, one hundred twelve thousand, one hundred eleven".