1321113443 has 8 divisors (see below), whose sum is σ = 1426772928. Its totient is φ = 1216030464.

The previous prime is 1321113421. The next prime is 1321113449. The reversal of 1321113443 is 3443111231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321113443 - 2¹² = 1321109347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321113449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139355 + ... + 148532.

It is an arithmetic number, because the mean of its divisors is an integer number (178346616).

Almost surely, 2^1321113443 is an apocalyptic number.

1321113443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1321113443 is a deficient number, since it is larger than the sum of its proper divisors (105659485).

1321113443 is a wasteful number, since it uses less digits than its factorization.

1321113443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288253.

The product of its digits is 864, while the sum is 23.

The square root of 1321113443 is about 36347.1242741431. The cubic root of 1321113443 is about 1097.2696591300.

Adding to 1321113443 its reverse (3443111231), we get a palindrome (4764224674).

The spelling of 1321113443 in words is "one billion, three hundred twenty-one million, one hundred thirteen thousand, four hundred forty-three".