LaTeX does not have a built-in feature to automatically format large numbers with thousands separators. Users can manually format numbers by inserting commands like $1\,000\,000\,000$, $1\;000\;000\;000$, or $1\:000\:000\:000$, depending on their preferred spacing style. Alternatively, scientific notation can be used, such as $10^9$. For a more automated solution, the numprint package can be utilized, allowing for easier formatting of numbers with thousands separators. Further details on the numprint package can be found on the CTAN website.