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A millennium (plural millennia or millenniums) is a period of time equal to 1000 years, also called kiloyears. It derives from the Latin mille, thousand, and annus, year. ..more definition+
In relation to the base unit of [time] => (seconds), 1 Sidereal Days (Sd) is equal to 86164.1 seconds, while 1 Millenniums (mill) = 31540000000 seconds.| 221000 Sidereal Days | to common time units |
|---|---|
| 221000 Sd | = 19042266100 seconds (s) |
| 221000 Sd | = 317371101.66667 minutes (min) |
| 221000 Sd | = 5289518.3611111 hours (hr) |
| 221000 Sd | = 220396.59837963 days (day) |
| 221000 Sd | = 31485.228339947 weeks (wk) |
| 221000 Sd | = 603.82629693049 years (yr) |
| 221000 Sd | = 7245.9155631659 months (mo) |
| 221000 Sd | = 60.374971781864 decades (dec) |
| 221000 Sd | = 6.0374971781864 centuries (cent) |
| 221000 Sd | = 0.60374971781864 millenniums (mill) |