12112003231 has 4 divisors (see below), whose sum is σ = 12112227864. Its totient is φ = 12111778600.

The previous prime is 12112003229. The next prime is 12112003237. The reversal of 12112003231 is 13230021121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13230021121 = 103 ⋅128446807.

It is a cyclic number.

It is not a de Polignac number, because 12112003231 - 2¹ = 12112003229 is a prime.

It is a super-2 number, since 2×12112003231² (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 (12112003237) 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, 22521 + ... + 157261.

It is an arithmetic number, because the mean of its divisors is an integer number (3028056966).

Almost surely, 2^12112003231 is an apocalyptic number.

12112003231 is a deficient number, since it is larger than the sum of its proper divisors (224633).

12112003231 is an equidigital number, since it uses as much as digits as its factorization.

12112003231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224632.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12112003231 its reverse (13230021121), we get a palindrome (25342024352).

The spelling of 12112003231 in words is "twelve billion, one hundred twelve million, three thousand, two hundred thirty-one".