12112111031 has 4 divisors (see below), whose sum is σ = 12207482112. Its totient is φ = 12016739952.

The previous prime is 12112110943. The next prime is 12112111133. The reversal of 12112111031 is 13011121121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13011121121 = 29 ⋅448659349.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12112111031 is a prime.

It is a super-2 number, since 2×12112111031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12112110997 and 12112111015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112111331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47685350 + ... + 47685603.

It is an arithmetic number, because the mean of its divisors is an integer number (3051870528).

Almost surely, 2^12112111031 is an apocalyptic number.

12112111031 is a deficient number, since it is larger than the sum of its proper divisors (95371081).

12112111031 is an equidigital number, since it uses as much as digits as its factorization.

12112111031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95371080.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 12112111031 its reverse (13011121121), we get a palindrome (25123232152).

The spelling of 12112111031 in words is "twelve billion, one hundred twelve million, one hundred eleven thousand, thirty-one".