Adding to 4021010110421 its reverse (1240110101204), we get a palindrome (5261120211625).
It is a cyclic number.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 4021010110421.
It is a congruent number.
Almost surely, 24021010110421 is an apocalyptic number.
It is an amenable number.
4021010110421 is a wasteful number, since it uses less digits than its factorization.
4021010110421 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 55144.
The spelling of 4021010110421 in words is "four trillion, twenty-one billion, ten million, one hundred ten thousand, four hundred twenty-one".