4021033320221 has 2 divisors, whose sum is σ = 4021033320222. Its totient is φ = 4021033320220.

The previous prime is 4021033320167. The next prime is 4021033320233. The reversal of 4021033320221 is 1220233301204.

4021033320221 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2664448994596 + 1356584325625 = 1632314^2 + 1164725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4021033320221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021033329221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010516660110 + 2010516660111.

It is an arithmetic number, because the mean of its divisors is an integer number (2010516660111).

Almost surely, 2^{4021033320221} is an apocalyptic number.

It is an amenable number.

4021033320221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021033320221 is an equidigital number, since it uses as much as digits as its factorization.

4021033320221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 4021033320221 its reverse (1220233301204), we get a palindrome (5241266621425).

The spelling of 4021033320221 in words is "four trillion, twenty-one billion, thirty-three million, three hundred twenty thousand, two hundred twenty-one".