Unregistered, unnamed, and not claimed by any documented product.
16113 has no IANA assignment and no Nmap service name. It is in Nmap's default scan set on frequency evidence only. Searching public source code for it turns up nothing but coincidental matches, which is itself the answer: there is no default service here to describe.
Expose with care
No verdict can be inherited from the number. Fingerprint the listener; whatever it is, it is not something a firewall rule can be written for blind.
$ nmap -Pn -sV -p 16113 TARGETSeen this on your network? Beige Box scans your Wi-Fi and shows every open port on every device — and its Ports tool links straight back here.
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Corrections or a missing port? Reply @rimrocksystems.