viginti unus

Latin

**Latin numbers ^(edit)**
← 20	XXI 21	22 → ^{[a], [b]}
Cardinal: vīgintī ūnus, ūnus et vīgintī Ordinal: ūnetvīcēsimus, ūnus et vīcēsimus, vīcēsimus prīmus Adverbial: vīciēs semel, vīciēs et semel, semel atque vīciēs

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vīgintī ūnus

Wikipedia ^la

From vīgintī (“twenty”) + ūnus (“one”).

vīgintī ūnus (feminine vīgintī ūna, neuter vīgintī ūnum); indeclinable portion with a first/second-declension numeral, singular only

twenty-one; 21
- 27 BCE – 25 BCE, Titus Livius, Ab Urbe Condita 21.22.4:
  elephanti viginti unus
  twenty-one elephants

Indeclinable portion with a first/second-declension adjective (pronominal declension), singular only.