No. 3,165 in Spanish
xxi
"XXI" is not a Spanish word but the Roman numeral for 21.
In a sentence
Vivimos en el siglo XXI.
We live in the 21st century.
Used as a numeral designating the century.
El evento tendrá lugar en el XXI Congreso Internacional.
The event will take place at the 21st International Congress.
Used in a formal title to specify a sequence number.
El estilo arquitectónico del edificio parece ser del siglo XXI.
The architectural style of the building seems to be from the 21st century.
Refers to a time period introducing modernity.
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