Break into Powers

Given a positive integer $X$, an operation on $X$ is defined as follows: - Split $X$ into powers of $10$ such that the number of integers into which $X$ is split, is **minimum**. Let $A$ define the array containing all integers of the split. - Sort the array $A$ in **non-increasing** order. - Concatenate the elements of $A$ and assign the value to $X$. For example, an operation on $X = 22$ look