0 - 1 of 1 tags for extract numbers from string

I have a column that has both numbers and texts in the fields.
Examples:
xyz 120 abc lmnop
xy 120
120
Null
?/ 567 abc
.... 233

As you can see the fields can have numbers, texts, special chacters, null values, etc. If there is a no numbers in a field I want to return null for that.