1143442121 has 2 divisors, whose sum is σ = 1143442122. Its totient is φ = 1143442120.

The previous prime is 1143442067. The next prime is 1143442123. The reversal of 1143442121 is 1212443411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 988788025 + 154654096 = 31445^2 + 12436^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143442121 - 2¹⁴ = 1143425737 is a prime.

Together with 1143442123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1143442123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571721060 + 571721061.

It is an arithmetic number, because the mean of its divisors is an integer number (571721061).

Almost surely, 2^1143442121 is an apocalyptic number.

It is an amenable number.

1143442121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143442121 is an equidigital number, since it uses as much as digits as its factorization.

1143442121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 23.

The square root of 1143442121 is about 33814.8210256982. The cubic root of 1143442121 is about 1045.6942712106.

Adding to 1143442121 its reverse (1212443411), we get a palindrome (2355885532).

The spelling of 1143442121 in words is "one billion, one hundred forty-three million, four hundred forty-two thousand, one hundred twenty-one".