number ids

function numberToToken(int) {
    return Number('10000'+int).toString(36);
}

function tokenToNumber(token) {
    return Number((parseInt(token, 36)+'').slice(4));
}

var num = 123;

console.log('starting with', num);

var token = numberToToken(num);

console.log('makes token', token);

console.log('and back to', tokenToNumber(token));