If you have Microsoft "Word," try this: In "Word," type (c) followed by a space. If you have the default settings, the (c) will change to a copyright symbol.
Next, select and copy (CTRL + C) that copyright symbol.
Then, go to your page in Illustrator, click on the Text tool, and paste (CTRL + V) the symbol. Once you've done that, you can change the font size, add words after the symbol, and so forth, just as you can for regular text.
There may be simpler ways that someone else will mention to achieve this result, but at least this works.