Numbers

Chinese numbers are very regular. While Arabic (Western) numerals have become more common, the Chinese numerals shown below are still used, particularly in informal contexts like markets.

English	Chinese	Pinyin	Play
0	〇, 零	líng
1	一	yī
2	二	èr
3	三	sān
4	四	sì
5	五	wǔ
6	六	lìu
7	七	qī
8	八	bā
9	九	jǐu
10	十	shí
11	十一	shí-yī
12	十二	shí-èr
13	十三	shí-sān
20	二十	èr-shí
21	二十一	èr-shí-yī
22	二十二	èr-shí-èr
100	一百	yī-bǎi
101	一百〇一	yī-bǎi-líng-yī
110	一百一十	yī-bǎi-yī-shí
200	二百	èr-bǎi
1000	一千	yī-qiān

Useful Information

For numbers above 100, any "gaps" must be filled in with 〇 líng, as eg. 一百一 yībǎiyī would otherwise be taken as shorthand for "110". A single unit of tens may be written and pronounced either 一十 yīshí or just 十 shí.
100    一百 yī-bǎi
101    一百〇一 yī-bǎi-líng-yī
110    一百一十 yī-bǎi-yī-shí
111    一百一十一 yī-bǎi-yī-shí-yī
200    二百 èr-bǎi
300    三百 sān-bǎi
500    五百 wǔ-bǎi
1000    一千 yī-qiān
2000    二千 èr-qiān

Numbers above 10,000 are grouped by in units of four digits, starting with 万 wàn (ten thousand). "One million" in Chinese is thus "hundred tenthousands" (一百万).

10,000    一万 yī-wàn
10,001    一万〇一 yī-wàn-líng-yī
10,002    一万〇二 yī-wàn-líng-èr
20,000    二万 èr-wàn
50,000    五万 wǔ-wàn
100,000    十万 shí-wàn
200,0000    二十万 èr-shí-wàn
1,000,000    一百万 yī-bǎi-wàn
10,000,000    一千万 yī-qiān-wàn
100,000,000    一亿 yi1yi4