FreeRare
21
Never owned
- Fibonacci number
Starting bid€21
Duration24 h
Your starting bid opens the auction. You only pay if you are ahead at the end: then your saved card is charged.
Sign in and start the auctionWhat 21 means
- CultureIn blackjack, 21 is the goal.
By the numbers
- Roman
- XXI
- Binary
- 10101
- Digit sum
- 3
- Prime factors
- 3 · 7
- Digits
- 2
Maths is calculated automatically, meanings are curated by our editors. Something missing?