1121320443 has 8 divisors (see below), whose sum is σ = 1497465856. Its totient is φ = 746361000.

The previous prime is 1121320427. The next prime is 1121320457. The reversal of 1121320443 is 3440231211.

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

It is not a de Polignac number, because 1121320443 - 2⁴ = 1121320427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121320843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294283 + ... + 298068.

It is an arithmetic number, because the mean of its divisors is an integer number (187183232).

Almost surely, 2^1121320443 is an apocalyptic number.

1121320443 is a deficient number, since it is larger than the sum of its proper divisors (376145413).

1121320443 is an equidigital number, since it uses as much as digits as its factorization.

1121320443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592985.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1121320443 is about 33486.1231407877. The cubic root of 1121320443 is about 1038.9067786896.

Adding to 1121320443 its reverse (3440231211), we get a palindrome (4561551654).

The spelling of 1121320443 in words is "one billion, one hundred twenty-one million, three hundred twenty thousand, four hundred forty-three".