廿一世紀

twenty; the twentieth; used in formal contexts for the number twenty.

The number one; single; a; as soon as; entire; whole; all; a "one" radical in Chinese characters; also used for clarity when spelling out numbers.

A generation or lifetime; an era or period of time; the world or society; a surname.

To record; discipline; order; age; era; period; a surname; a unit of time, like a century or geological period.