For Arabic numerals 0 to 10, the Chinese equivalents are:
○ (or 零), 一, 二, 三, 四, 五, 六, 七, 八, 九, 十
Further on, they are:
十一 = 11, 十二 = 12, 十九 = 19
二十 = 20, 二十一 = 21, 二十八 = 28
三十 = 30, 四十 = 40, 九十 = 90, 九十九 = 99
一百 = 100
一百零一 = 101, 一百十 = 110, 一百十一 = 111
三百二十七 = 327, 九百零九 = 909
一千 = 1000
一千零一 = 1001, 五千零四十 = 5040, 八千七百二十五 = 8725
一萬 = 10,000
四萬零八百零一 = 40,801
一億 = 100,000,000
N.B.:
Numbers like 15 are written e.g. 十五, not 一十五.
A zero is pronounced or written when sandwiched by two digits: 101 is 一百零一, and 3020 is 三千零二十. Notice the last zero in 3020 is /not/ pronounced because it is not between two other digits.
If there are two or more zeroes in succession between two non-zero digits, as in 1001, only one is pronounced: 一千零一. However, if the two or more zeroes are separate and also sandwiched, as in 40,801, each is read as normal: 四萬零八百零一.