1143221013 has 32 divisors (see below), whose sum is σ = 1944883200. Its totient is φ = 656391600.

The previous prime is 1143221011. The next prime is 1143221021. The reversal of 1143221013 is 3101223411.

1143221013 is a `hidden beast` number, since 11 + 432 + 210 + 13 = 666.

It is not a de Polignac number, because 1143221013 - 2¹ = 1143221011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143221011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95653 + ... + 106938.

It is an arithmetic number, because the mean of its divisors is an integer number (60777600).

Almost surely, 2^1143221013 is an apocalyptic number.

It is an amenable number.

1143221013 is a deficient number, since it is larger than the sum of its proper divisors (801662187).

1143221013 is a wasteful number, since it uses less digits than its factorization.

1143221013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202630 (or 202624 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1143221013 is about 33811.5514728325. The cubic root of 1143221013 is about 1045.6268647165.

Adding to 1143221013 its reverse (3101223411), we get a palindrome (4244444424).

The spelling of 1143221013 in words is "one billion, one hundred forty-three million, two hundred twenty-one thousand, thirteen".