123112116131 has 4 divisors (see below), whose sum is σ = 123133762200. Its totient is φ = 123090470064.

The previous prime is 123112116119. The next prime is 123112116139. The reversal of 123112116131 is 131611211321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131611211321 = 19 ⋅6926905859.

It is a cyclic number.

It is not a de Polignac number, because 123112116131 - 2¹⁰ = 123112115107 is a prime.

It is a super-2 number, since 2×123112116131² (a number of 23 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 = 123112116097 and 123112116106.

It is not an unprimeable number, because it can be changed into a prime (123112116139) 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, 10814501 + ... + 10825878.

It is an arithmetic number, because the mean of its divisors is an integer number (30783440550).

Almost surely, 2^123112116131 is an apocalyptic number.

123112116131 is a deficient number, since it is larger than the sum of its proper divisors (21646069).

123112116131 is an equidigital number, since it uses as much as digits as its factorization.

123112116131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21646068.

The product of its digits is 216, while the sum is 23.

Adding to 123112116131 its reverse (131611211321), we get a palindrome (254723327452).

The spelling of 123112116131 in words is "one hundred twenty-three billion, one hundred twelve million, one hundred sixteen thousand, one hundred thirty-one".