What two numbers add up to 2120?

There are infinite combinations of two numbers that add up to 2120. Here are some examples using negative numbers:

-1 + 2121 = 2120
-2 + 2122 = 2120
-3 + 2123 = 2120
...

Here are some examples using two fractions that will add up to 2120:

2120/2 + 2120/2 = 2120
4240/3 + 2120/3 = 2120
6360/4 + 2120/4 = 2120
...

And here are some examples using two decimal numbers that will add up to 2120:

1.25 + 2118.75 = 2120
2.50 + 2117.5 = 2120
3.75 + 2116.25 = 2120
...

As you can see from the lists above, it can go on forever. However, when answering "What two numbers add up to 2120?", it may be more interesting to set some criteria to limit the result. We will set the follow criteria:

1) Only positive whole numbers can add up to 2120. (0 is not a positive or negative number and should not be included.)

2) Since a+b=29 is the same as b+a=29, we should only list it once.

Now, the answer to "What two numbers add up to 2120?" has 1060 answers:

1 + 2119 = 2120
2 + 2118 = 2120
3 + 2117 = 2120
.
.
1058 + 1062 = 2120
1059 + 1061 = 2120
1060 + 1060 = 2120

We have truncated the list above due to space, but you may be interested to know that we calculated the number of answers by dividing 2120 by 2 and then rounded down to the nearest whole number if necessary.

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What two numbers add up to 2121?
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