12112111121 has 32 divisors (see below), whose sum is σ = 14102000640. Its totient is φ = 10294257600.

The previous prime is 12112110943. The next prime is 12112111133. The reversal of 12112111121 is 12111121121.

It is not a de Polignac number, because 12112111121 - 2¹⁸ = 12111848977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12112111096 and 12112111105.

It is not an unprimeable number, because it can be changed into a prime (12112111321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2699546 + ... + 2704028.

It is an arithmetic number, because the mean of its divisors is an integer number (440687520).

Almost surely, 2^12112111121 is an apocalyptic number.

12112111121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12112111121 is a deficient number, since it is larger than the sum of its proper divisors (1989889519).

12112111121 is a wasteful number, since it uses less digits than its factorization.

12112111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4757.

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

Adding to 12112111121 its reverse (12111121121), we get a palindrome (24223232242).

It can be divided in two parts, 121 and 12111121, that multiplied together give a palindrome (1465445641).

The spelling of 12112111121 in words is "twelve billion, one hundred twelve million, one hundred eleven thousand, one hundred twenty-one".