1143221135 has 16 divisors (see below), whose sum is σ = 1568996352. Its totient is φ = 783348000.

The previous prime is 1143221129. The next prime is 1143221171. The reversal of 1143221135 is 5311223411.

It is not a de Polignac number, because 1143221135 - 2⁶ = 1143221071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1143221135.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 39530 + ... + 62040.

It is an arithmetic number, because the mean of its divisors is an integer number (98062272).

Almost surely, 2^1143221135 is an apocalyptic number.

1143221135 is a deficient number, since it is larger than the sum of its proper divisors (425775217).

1143221135 is a wasteful number, since it uses less digits than its factorization.

1143221135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23974.

The product of its digits is 720, while the sum is 23.

The square root of 1143221135 is about 33811.5532769496. The cubic root of 1143221135 is about 1045.6269019115.

Adding to 1143221135 its reverse (5311223411), we get a palindrome (6454444546).

The spelling of 1143221135 in words is "one billion, one hundred forty-three million, two hundred twenty-one thousand, one hundred thirty-five".