• Western (Arabic) Numeral Quadrillion, 10¹⁵
  • Last: Trillion, 10¹²
  • Next: Quintillion, 10¹⁸

Pronunciation

• SAMPA : /kwA"dZrIlj@n/
• IPA: /kwaˈdɹɪljən/ (in careful speech), /kwaˈʤɹɪljən/ (non-standard)
• Shavian : 𐑒𐑢𐑭𐑡𐑮𐑦𐑤𐑾

Etymology

quadr-, four + -illion, from million; ie, a million, million, million, million

Cardinal number

1. Usually it means a thousand thousand billion. That is to say, a 1 followed by fifteen zeros, 10¹⁵.

   ISO prefix: peta-

2. (Dated usage, notably British) A million trillion or a 1 followed by 21 zeros, 10²⁴.

   ISO prefix: yotta-

Synonym

• billiard (1)

Translations

• Dutch: biljard
• Esperanto: duiliardo (1), kvariliono (2)
• Estonian: kvadriljon
• Finnish: biljardi (1), kvadriljoona (2)
• Greek: [[ ]] (tetraekatommyria)
• Romanian: biliard n
• Spanish: mil billones (1), cuatrillón (2)
• Vietnamese: nghìn triệu triệu (1); triệu luỹ thừa bốn (2; lit: "fourth-power million")