1143311421 has 32 divisors (see below), whose sum is σ = 1847681280. Its totient is φ = 613886976.

The previous prime is 1143311413. The next prime is 1143311423. The reversal of 1143311421 is 1241133411.

It is not a de Polignac number, because 1143311421 - 2³ = 1143311413 is a prime.

It is a super-3 number, since 3×1143311421³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143311423) 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 in 31 ways as a sum of consecutive naturals, for example, 250855 + ... + 255371.

It is an arithmetic number, because the mean of its divisors is an integer number (57740040).

Almost surely, 2^1143311421 is an apocalyptic number.

It is an amenable number.

1143311421 is a deficient number, since it is larger than the sum of its proper divisors (704369859).

1143311421 is a wasteful number, since it uses less digits than its factorization.

1143311421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5253.

The product of its digits is 288, while the sum is 21.

The square root of 1143311421 is about 33812.8883859395. Note that the first 3 decimals coincide. The cubic root of 1143311421 is about 1045.6544273489.

Adding to 1143311421 its reverse (1241133411), we get a palindrome (2384444832).

The spelling of 1143311421 in words is "one billion, one hundred forty-three million, three hundred eleven thousand, four hundred twenty-one".