4143442021 has 2 divisors, whose sum is σ = 4143442022. Its totient is φ = 4143442020.

The previous prime is 4143441971. The next prime is 4143442063. The reversal of 4143442021 is 1202443414.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2094069121 + 2049372900 = 45761^2 + 45270^2 .

It is a cyclic number.

It is not a de Polignac number, because 4143442021 - 2⁷ = 4143441893 is a prime.

It is a super-2 number, since 2×4143442021² = 34336223562777128882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4143443021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2071721010 + 2071721011.

It is an arithmetic number, because the mean of its divisors is an integer number (2071721011).

Almost surely, 2^4143442021 is an apocalyptic number.

It is an amenable number.

4143442021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4143442021 is an equidigital number, since it uses as much as digits as its factorization.

4143442021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 4143442021 is about 64369.5737208194. The cubic root of 4143442021 is about 1606.1536490202.

Adding to 4143442021 its reverse (1202443414), we get a palindrome (5345885435).

The spelling of 4143442021 in words is "four billion, one hundred forty-three million, four hundred forty-two thousand, twenty-one".