4021333323421 has 2 divisors, whose sum is σ = 4021333323422. Its totient is φ = 4021333323420.

The previous prime is 4021333323389. The next prime is 4021333323437. The reversal of 4021333323421 is 1243233331204.

It is a happy number.

4021333323421 is digitally balanced in base 2, because in such base 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., 3249316287396 + 772017036025 = 1802586^2 + 878645^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021333323421 - 2⁵ = 4021333323389 is a prime.

It is a super-2 number, since 2×4021333323421² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021333323461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010666661710 + 2010666661711.

It is an arithmetic number, because the mean of its divisors is an integer number (2010666661711).

Almost surely, 2^{4021333323421} is an apocalyptic number.

It is an amenable number.

4021333323421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021333323421 is an equidigital number, since it uses as much as digits as its factorization.

4021333323421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 31.

Adding to 4021333323421 its reverse (1243233331204), we get a palindrome (5264566654625).

The spelling of 4021333323421 in words is "four trillion, twenty-one billion, three hundred thirty-three million, three hundred twenty-three thousand, four hundred twenty-one".