4021333430021 has 2 divisors, whose sum is σ = 4021333430022. Its totient is φ = 4021333430020.

The previous prime is 4021333429991. The next prime is 4021333430123. The reversal of 4021333430021 is 1200343331204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3860384025796 + 160949404225 = 1964786^2 + 401185^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021333430021 - 2¹⁰ = 4021333428997 is a prime.

It is a super-2 number, since 2×4021333430021² (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 (4021333430221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010666715010 + 2010666715011.

It is an arithmetic number, because the mean of its divisors is an integer number (2010666715011).

Almost surely, 2^{4021333430021} is an apocalyptic number.

It is an amenable number.

4021333430021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021333430021 is an equidigital number, since it uses as much as digits as its factorization.

4021333430021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 4021333430021 its reverse (1200343331204), we get a palindrome (5221676761225).

The spelling of 4021333430021 in words is "four trillion, twenty-one billion, three hundred thirty-three million, four hundred thirty thousand, twenty-one".