4043142343421 has 2 divisors, whose sum is σ = 4043142343422. Its totient is φ = 4043142343420.

The previous prime is 4043142343337. The next prime is 4043142343433. The reversal of 4043142343421 is 1243432413404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2294585714521 + 1748556628900 = 1514789^2 + 1322330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4043142343421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4043142343451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2021571171710 + 2021571171711.

It is an arithmetic number, because the mean of its divisors is an integer number (2021571171711).

Almost surely, 2^{4043142343421} is an apocalyptic number.

It is an amenable number.

4043142343421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4043142343421 is an equidigital number, since it uses as much as digits as its factorization.

4043142343421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 35.

Adding to 4043142343421 its reverse (1243432413404), we get a palindrome (5286574756825).

The spelling of 4043142343421 in words is "four trillion, forty-three billion, one hundred forty-two million, three hundred forty-three thousand, four hundred twenty-one".