登 means to climb, ascend and is a JLPT N3 kanji. It has 12 strokes and uses the two feet spread apart radical (癶).
Stroke order · 12 strokes
On'yomi (音読み)
トウ、ト
Kun'yomi (訓読み)
のぼ(る)、あ(がる)
Radical
癶 · two feet spread apart
Strokes
12
How to remember 登
Climbing upward step by step with two feet (癶) — the image of climbing a mountain. 登山 (mountain climbing), 登録 (registration) — you 'climb' even on a form.