12112122431 has 4 divisors (see below), whose sum is σ = 12119113272. Its totient is φ = 12105131592.

The previous prime is 12112122403. The next prime is 12112122487. The reversal of 12112122431 is 13422121121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13422121121 = 103007 ⋅130303.

It is a cyclic number.

It is not a de Polignac number, because 12112122431 - 2⁶ = 12112122367 is a prime.

It is a super-2 number, since 2×12112122431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3492821 + ... + 3496286.

It is an arithmetic number, because the mean of its divisors is an integer number (3029778318).

Almost surely, 2^12112122431 is an apocalyptic number.

12112122431 is a deficient number, since it is larger than the sum of its proper divisors (6990841).

12112122431 is an equidigital number, since it uses as much as digits as its factorization.

12112122431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6990840.

The product of its digits is 192, while the sum is 20.

Adding to 12112122431 its reverse (13422121121), we get a palindrome (25534243552).

The spelling of 12112122431 in words is "twelve billion, one hundred twelve million, one hundred twenty-two thousand, four hundred thirty-one".