4021033443421 has 4 divisors (see below), whose sum is σ = 4077667717344. Its totient is φ = 3964399169500.

The previous prime is 4021033443419. The next prime is 4021033443607. The reversal of 4021033443421 is 1243443301204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4021033443421 - 2¹ = 4021033443419 is a prime.

It is a super-2 number, since 2×4021033443421² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021033447421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28317136855 + ... + 28317136996.

It is an arithmetic number, because the mean of its divisors is an integer number (1019416929336).

Almost surely, 2^{4021033443421} is an apocalyptic number.

It is an amenable number.

4021033443421 is a deficient number, since it is larger than the sum of its proper divisors (56634273923).

4021033443421 is an equidigital number, since it uses as much as digits as its factorization.

4021033443421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56634273922.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 4021033443421 its reverse (1243443301204), we get a palindrome (5264476744625).

The spelling of 4021033443421 in words is "four trillion, twenty-one billion, thirty-three million, four hundred forty-three thousand, four hundred twenty-one".