Geoserver WFS request resultType=hits

I try get number of features through WFS request:

    $.ajax('http://x.x.x.x/geoserver/wfs',{
            type: 'GET',
            data: {
                service: 'WFS',
                version: '1.1.0',
                request: 'GetFeature',

                typeName: 'workspace:layer',
                outputFormat: 'text/javascript',
                srsname: 'EPSG:4326',
                resultType: 'hits',
                bbox: extent.join(',') + ',EPSG:4326'
                },
            dataType: 'jsonp',
            jsonpCallback:'parseResponse',
            jsonp:'format_options'
    }).then(function(response) {

    var result = parserJSON.readFeatures(response);
    });

But I get Uncaught SyntaxError. Response is not JSONP.

response:

    xmlns:sf="http://www.openplans.org/spearfish"
    xmlns:wfs="http://www.opengis.net/wfs"
    xmlns:gml="http://www.opengis.net/gml"
    xmlns:ogc="http://www.opengis.net/ogc"

    xmlns:ows="http://www.opengis.net/ows"
    xmlns:tiger="http://www.census.gov" xmlns:topp="http://www.openplans.org/topp"
    xmlns:baikalgeol="http://www.geol.irk.ru/baikalgeol"
    xmlns:xlink="http://www.w3.org/1999/xlink"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" numberOfFeatures="35"
    timeStamp="2016-10-07T02:38:43.015Z"
    xsi:schemaLocation="http://www.opengis.net/wfs http://schemas.opengis.net/wfs/1.1.0/wfs.xsd"/>

As see server return numberOfFeatures="35".

I changed outputFormat on 'GML3' and parseGML3 (openlayers format). But it did not help.

How wrap response in json or read this xml without rest?