1143221303 has 6 divisors (see below), whose sum is σ = 1329869736. Its totient is φ = 979903932.

The previous prime is 1143221293. The next prime is 1143221311. The reversal of 1143221303 is 3031223411.

It is not a de Polignac number, because 1143221303 - 2⁶ = 1143221239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143221363) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11665475 + ... + 11665572.

It is an arithmetic number, because the mean of its divisors is an integer number (221644956).

Almost surely, 2^1143221303 is an apocalyptic number.

1143221303 is a deficient number, since it is larger than the sum of its proper divisors (186648433).

1143221303 is an equidigital number, since it uses as much as digits as its factorization.

1143221303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23331061 (or 23331054 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1143221303 is about 33811.5557613074. Note that the first 3 decimals coincide. The cubic root of 1143221303 is about 1045.6269531309.

Adding to 1143221303 its reverse (3031223411), we get a palindrome (4174444714).

The spelling of 1143221303 in words is "one billion, one hundred forty-three million, two hundred twenty-one thousand, three hundred three".