4143538121 has 2 divisors, whose sum is σ = 4143538122. Its totient is φ = 4143538120.

The previous prime is 4143538103. The next prime is 4143538177. The reversal of 4143538121 is 1218353414.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2686970896 + 1456567225 = 51836^2 + 38165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4143538121 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4143138121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2071769060 + 2071769061.

It is an arithmetic number, because the mean of its divisors is an integer number (2071769061).

Almost surely, 2^4143538121 is an apocalyptic number.

It is an amenable number.

4143538121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4143538121 is an equidigital number, since it uses as much as digits as its factorization.

4143538121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 4143538121 is about 64370.3201871794. The cubic root of 4143538121 is about 1606.1660662466.

The spelling of 4143538121 in words is "four billion, one hundred forty-three million, five hundred thirty-eight thousand, one hundred twenty-one".