בֶּן־עֶשְׂרִ֧ים וּשְׁתַּ֛יִם שָׁנָ֖ה אָמ֣וֹן בְּמָלְכ֑וֹ וּשְׁתַּ֣יִם שָׁנִ֔ים מָלַ֖ךְ בִּֽירוּשָׁלִָֽם׃
Amon was twenty and two years old when he began to reign; and he reigned two years in Jerusalem.
Read midrashic interpretation of II Chronicles 33:21: and classical rabbinic exegesis.