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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 Hipparchic Cycles (HC) is equal to 9593424000 seconds, while 1 Millenniums (mill) = 31540000000 seconds.| 421500 Hipparchic Cycles | to common time units |
|---|---|
| 421500 HC | = 4043628216000000 seconds (s) |
| 421500 HC | = 67393803600000 minutes (min) |
| 421500 HC | = 1123230060000 hours (hr) |
| 421500 HC | = 46801252500 days (day) |
| 421500 HC | = 6685893214.2857 weeks (wk) |
| 421500 HC | = 128222609.58904 years (yr) |
| 421500 HC | = 1538671315.0685 months (mo) |
| 421500 HC | = 12820634.800254 decades (dec) |
| 421500 HC | = 1282063.4800254 centuries (cent) |
| 421500 HC | = 128206.34800254 millenniums (mill) |