MWE:
\documentclass[italian]{article}
\usepackage{babel}
\usepackage{fmtcount}
\begin{document}
\section{A}
\section{B}
\section{C}
\section{D}
\ordinalstring{section}
\Ordinalstring{section}
\ORDINALstring{section}
\end{document}
Output is basically something like:
1 A
2 B
3 C
4 D
quarto Quarto NOVANTADUESIMO