111111001101

111111001101 is a binary number. In binary, each digit represents a power of two. The number can be converted to its decimal equivalent by summing the products of each digit and its corresponding power of two. Starting from the rightmost digit as 2^0, then 2^1, 2^2, and so on. For 111111001101, the decimal conversion is:

(1 * 2^11) + (1 * 2^10) + (1 * 2^9) + (1 * 2^8) + (1 * 2^7) + (1 * 2^6) + (0 * 2^5) + (0 * 2^4) + (1 * 2^3) + (1 * 2^2) + (0 * 2^1) + (1 * 2^0)

= 2048 + 1024 + 512 + 256 + 128 + 64 + 0 + 0 + 8 + 4 + 0 + 1

= 4045

Therefore, the binary number 111111001101 is equal to the decimal number 4045.

In hexadecimal notation, this binary number can also be represented. Binary digits are grouped in fours from right to left, with each group converted to a hexadecimal digit.

1111 1100 1101

1101 in binary is D in hexadecimal.

1100 in binary is C in hexadecimal.

1111 in binary is F in hexadecimal.

So, 111111001101 in binary is FCD in hexadecimal.