1111321443 has 4 divisors (see below), whose sum is σ = 1481761928. Its totient is φ = 740880960.

The previous prime is 1111321423. The next prime is 1111321447. The reversal of 1111321443 is 3441231111.

1111321443 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1111321443 - 2⁵ = 1111321411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111321447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185220238 + ... + 185220243.

It is an arithmetic number, because the mean of its divisors is an integer number (370440482).

Almost surely, 2^1111321443 is an apocalyptic number.

1111321443 is a deficient number, since it is larger than the sum of its proper divisors (370440485).

1111321443 is an equidigital number, since it uses as much as digits as its factorization.

1111321443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370440484.

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

The square root of 1111321443 is about 33336.4881623725. The cubic root of 1111321443 is about 1035.8095195361.

Adding to 1111321443 its reverse (3441231111), we get a palindrome (4552552554).

It can be divided in two parts, 111132 and 1443, that added together give a triangular number (112575 = T₄₇₄).

The spelling of 1111321443 in words is "one billion, one hundred eleven million, three hundred twenty-one thousand, four hundred forty-three".