13112321123 has 4 divisors (see below), whose sum is σ = 14304350328. Its totient is φ = 11920291920.

The previous prime is 13112321111. The next prime is 13112321149. The reversal of 13112321123 is 32112321131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32112321131 = 11 ⋅2919301921.

It is a cyclic number.

It is not a de Polignac number, because 13112321123 - 2²⁰ = 13111272547 is a prime.

It is a super-2 number, since 2×13112321123² (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 = 13112321095 and 13112321104.

It is not an unprimeable number, because it can be changed into a prime (13112321623) 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, 596014586 + ... + 596014607.

It is an arithmetic number, because the mean of its divisors is an integer number (3576087582).

Almost surely, 2^13112321123 is an apocalyptic number.

13112321123 is a deficient number, since it is larger than the sum of its proper divisors (1192029205).

13112321123 is a wasteful number, since it uses less digits than its factorization.

13112321123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192029204.

The product of its digits is 216, while the sum is 20.

Adding to 13112321123 its reverse (32112321131), we get a palindrome (45224642254).

The spelling of 13112321123 in words is "thirteen billion, one hundred twelve million, three hundred twenty-one thousand, one hundred twenty-three".