Adding to 4021321040000 its reverse (401231204), we get a palindrome (4021722271204).
It is a tau number, because it is divible by the number of its divisors (160).
Almost surely, 24021321040000 is an apocalyptic number.
4021321040000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
4021321040000 is an equidigital number, since it uses as much as digits as its factorization.
4021321040000 is an evil number, because the sum of its binary digits is even.
The spelling of 4021321040000 in words is "four trillion, twenty-one billion, three hundred twenty-one million, forty thousand".