12112004831 has 4 divisors (see below), whose sum is σ = 12529660200. Its totient is φ = 11694349464.

The previous prime is 12112004809. The next prime is 12112004837. The reversal of 12112004831 is 13840021121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13840021121 = 1511 ⋅9159511.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12112004831 is a prime.

It is a super-2 number, since 2×12112004831² (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 = 12112004797 and 12112004806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112004837) 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, 208827641 + ... + 208827698.

It is an arithmetic number, because the mean of its divisors is an integer number (3132415050).

Almost surely, 2^12112004831 is an apocalyptic number.

12112004831 is a deficient number, since it is larger than the sum of its proper divisors (417655369).

12112004831 is an equidigital number, since it uses as much as digits as its factorization.

12112004831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417655368.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 12112004831 its reverse (13840021121), we get a palindrome (25952025952).

The spelling of 12112004831 in words is "twelve billion, one hundred twelve million, four thousand, eight hundred thirty-one".