find records from mongo using spring mongo template where empId (integer) starts with 1100 only and not with 2200

Question

find records from mongo using spring mongo template where empId (integer) starts with 1100 only and not with 2200 tried regex but it's not returning results when I tried in compass nor from spring project.

Query query = new Query()
    .addCriteria(Criteria.where("empId").regex("^1100"))
    .addCriteria((CriteriaDefinition) Sort.by(Sort.Direction.DESC, "empId"));

{empId:{$regex: /^1100/ }}       //no records found
{"$regexMatch": {"input": {"$toString": empId}, $regex: "^11" }}  // all records returned

NOTE:
if I try on EmployeeName(String) it works. 
    {name:{$regex: /^Wa/ }}


SOLUTION in MONGOCOMPASS: { $where: "/^11.*/.test(this.empId)" }