\documentclass{standalone}

\usepackage{tikz}
\usetikzlibrary{calc,math}

\begin{document}
   \begin{tikzpicture}
       %Center
       \coordinate (C) at (0,0);
       
       %Radius
       \tikzmath{\R=5;};
       
       \draw (C) circle (\R);
       \filldraw (C) circle (2pt);
       
       %Number of points
       \tikzmath{\NP=12;};
       
       \tikzmath{\dAngle=360/\NP;};
       
       \foreach \n in {1,2,...,12}
       {
           \tikzmath{\Angle=\n*\dAngle;};
           \coordinate (P) at ($(C)+(\Angle:\R)$);
           \draw[dotted,-latex] (C) -- (P);
           \node at ($(C)!1.1!(P)$)
           {
              %Conver to roman numbers;
              $\uppercase\expandafter{\romannumeral\n\relax}$
           };
       }
       
   \end{tikzpicture}
\end{document}