וַיִּהְיוּ֙ חַיֵּ֣י שָׂרָ֔ה מֵאָ֥ה שָׁנָ֛ה וְעֶשְׂרִ֥ים שָׁנָ֖ה וְשֶׁ֣בַע שָׁנִ֑ים שְׁנֵ֖י חַיֵּ֥י שָׂרָֽה׃
And the life of Sarah was a hundred and seven and twenty years; these were the years of the life of Sarah.
Read kabbalistic (mystical) interpretation of Genesis 23:1: and classical mystical sources.