1011320443 has 16 divisors (see below), whose sum is σ = 1163427264. Its totient is φ = 861143040.

The previous prime is 1011320441. The next prime is 1011320449. The reversal of 1011320443 is 3440231101.

It is a cyclic number.

It is not a de Polignac number, because 1011320443 - 2¹ = 1011320441 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1011320443.

It is not an unprimeable number, because it can be changed into a prime (1011320441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1152721 + ... + 1153597.

It is an arithmetic number, because the mean of its divisors is an integer number (72714204).

Almost surely, 2^1011320443 is an apocalyptic number.

1011320443 is a deficient number, since it is larger than the sum of its proper divisors (152106821).

1011320443 is an equidigital number, since it uses as much as digits as its factorization.

1011320443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1011320443 is about 31801.2648018911. The cubic root of 1011320443 is about 1003.7593307229.

Adding to 1011320443 its reverse (3440231101), we get a palindrome (4451551544).

The spelling of 1011320443 in words is "one billion, eleven million, three hundred twenty thousand, four hundred forty-three".