Tangsa Digit One (U+16AC1) is a Unicode decimal digit from the Tangsa block. It resides on Plane 1 (SMP, Supplementary Multilingual Plane), has bidirectional class L (left-to-right), is not mirrored, and has combining class 0 (Not Reordered). In HTML it can be written as 𖫁 or 𖫁. Because it is outside the Basic Multilingual Plane, proper font support is required; otherwise a fallback box may be shown.