Converting cpp_int to binary string

Question

How can i convert boost cpp_int (>1000 bits) to it's binary representation in string (e.g. "1011....11001") ?

I have tried convert it by std::bitset, but it does not work on higher numbers

Edit - solution:
This contains a solution for this question:
Instead of int -> cpp_int

std::string toBinary(boost::multiprecision::cpp_int n)
{
    std::string r;
    while(n != 0)
    {
        r = (n % 2 == 0 ? "0":"1") + r;
        n /= 2;
    }
    return r;
}