The only way i know of to do this is with scripting. There may or may not be a way using InDesign’s built-in features. create a paragraph style with the styling the way you want all the numbers to appear and name that style “Page Numbering”, then create a character style the way you want the current page number to be formatted and name this style “Current Page” and run this script:
/*
Scripted by Skemicle
1:00 PM 10/17/2016
*/
if (parseFloat(app.version) < 6)
main();
else
app.doScript(main, ScriptLanguage.JAVASCRIPT, undefined, UndoModes.ENTIRE_SCRIPT, "Add page numbers in reverse");
function main() {
doc = app.activeDocument;
prefs = doc.viewPreferences;
hmu = prefs.horizontalMeasurementUnits;
vmu = prefs.verticalMeasurementUnits;
prefs.horizontalMeasurementUnits = MeasurementUnits.INCHES;
prefs.verticalMeasurementUnits = MeasurementUnits.INCHES;
var ro = doc.viewPreferences.rulerOrigin;
doc.viewPreferences.rulerOrigin = RulerOrigin.PAGE_ORIGIN;
page = doc.pages;
pages = [];
userlayer = doc.activeLayer;
try{
doc.layers.itemByName("Page Numbering").remove()
}catch(er){};
doc.layers.add({name:"Page Numbering"});
pageHeight = doc.documentPreferences.pageHeight;
pageWidth = doc.documentPreferences.pageWidth;
leftMargin = doc.marginPreferences.left;
rightMargin = pageWidth - doc.marginPreferences.right;
bottomMargin = pageHeight - doc.marginPreferences.bottom;
for(c=0;c<page.length;c++){
pages[c] = c + 1
}pageNumbers = pages.join(" ");
for(c=0;c<page.length;c++){
numbersFrame = page[c].textFrames.add({contents:pageNumbers, geometricBounds:[bottomMargin,leftMargin,bottomMargin + .25,rightMargin]});
numbersFrame.insertionPoints[0].appliedParagraphStyle = "Page Numbering";
word = numbersFrame.words
for(n=0;n<word.length;n++){
if(word[n].contents == c + 1){
word[n].appliedCharacterStyle = "Current Page";
}
}
}
doc.layers.itemByName("Page Numbering").locked = true;
app.activeDocument.activeLayer = userlayer;
doc.viewPreferences.rulerOrigin = ro;
prefs.horizontalMeasurementUnits = hmu;
prefs.verticalMeasurementUnits = vmu;
}
For information on installing and using this script see: https://creativepro.com/how-to-install-a-script-in-indesign-that-you-found-in-a-forum-or-blog-post.php