12131116123 has 8 divisors (see below), whose sum is σ = 13870150400. Its totient is φ = 10393586280.

The previous prime is 12131116117. The next prime is 12131116133. The reversal of 12131116123 is 32161113121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12131116123 - 2¹³ = 12131107931 is a prime.

It is a super-2 number, since 2×12131116123² (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 = 12131116094 and 12131116103.

It is not an unprimeable number, because it can be changed into a prime (12131116103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 358773 + ... + 391126.

It is an arithmetic number, because the mean of its divisors is an integer number (1733768800).

Almost surely, 2^12131116123 is an apocalyptic number.

12131116123 is a deficient number, since it is larger than the sum of its proper divisors (1739034277).

12131116123 is an equidigital number, since it uses as much as digits as its factorization.

12131116123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752217.

The product of its digits is 216, while the sum is 22.

Adding to 12131116123 its reverse (32161113121), we get a palindrome (44292229244).

The spelling of 12131116123 in words is "twelve billion, one hundred thirty-one million, one hundred sixteen thousand, one hundred twenty-three".