- Traditional Chinese Character(HanT):
2421
- Simplified Chinese Character(HanS):
2421
- Bopomofo(Mandarin Phonetic Symbols): ㄦˋ ㄙˋ ㄦˋ ㄧ (ㄦㄙㄦㄧ)
- Bopomofo(Zhuyin Keyboard Input/IME): "-4n4-4u " (-4n4-4u)
- 「2421」的注音符號/「2421」怎麼發音怎麼唸: ㄦˋ ㄙˋ ㄦˋ ㄧ
- (ASCII) Hanyu Pinyin: "ersieryi" "Er4Si4Er4Yi1" "Er4 Si4 Er4 Yi1" (ESEY)
- (Latin) Hànyǔ Pīnyīn: èrSìèrYī [ èr Sì èr Yī ]
- (英文翻譯) English Translation: "2421"
- (西語翻譯) Traducción Español: "2421"
- (日文翻譯) 日本語翻訳: "2421"