1143271111 has 2 divisors, whose sum is σ = 1143271112. Its totient is φ = 1143271110.

The previous prime is 1143271093. The next prime is 1143271159. The reversal of 1143271111 is 1111723411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1143271111 - 2⁹ = 1143270599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1143271411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571635555 + 571635556.

It is an arithmetic number, because the mean of its divisors is an integer number (571635556).

Almost surely, 2^1143271111 is an apocalyptic number.

1143271111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143271111 is an equidigital number, since it uses as much as digits as its factorization.

1143271111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 168, while the sum is 22.

The square root of 1143271111 is about 33812.2923062013. The cubic root of 1143271111 is about 1045.6421382430.

Adding to 1143271111 its reverse (1111723411), we get a palindrome (2254994522).

The spelling of 1143271111 in words is "one billion, one hundred forty-three million, two hundred seventy-one thousand, one hundred eleven".