Adding to 4021441413421 its reverse (1243141441204), we get a palindrome (5264582854625).
It is a strong prime.
It is a cyclic number.
It is a congruent number.
Almost surely, 24021441413421 is an apocalyptic number.
It is an amenable number.
4021441413421 is an equidigital number, since it uses as much as digits as its factorization.
4021441413421 is an odious number, because the sum of its binary digits is odd.
The spelling of 4021441413421 in words is "four trillion, twenty-one billion, four hundred forty-one million, four hundred thirteen thousand, four hundred twenty-one".