The Excel function: ISERR
Returns TRUE if the value is any error value except #N/A.
More information: support.microsoft.com/en-us/office/is-functions-0f2d7971-6019-40a0-a171-f2d869135665
Other functions
Returns information about the formatting, location, or contents of a cell
Returns a number corresponding to an error type
Returns information about the current operating environment
Returns TRUE if the value is blank
Returns TRUE if the value is any error value
Returns TRUE if the number is even
Returns TRUE if there is a reference to a cell that contains a formula
Returns TRUE if the value is a logical value
Returns TRUE if the value is the #N/A error value
Returns TRUE if the value is not text
Returns TRUE if the value is a number
Returns TRUE if the number is odd
Returns TRUE if the value is a reference
Returns TRUE if the value is text
Returns a value converted to a number
Returns the error value #N/A
Returns the sheet number of the referenced sheet
Returns the number of sheets in a reference
Returns a number indicating the data type of a value