11543321003 has 4 divisors (see below), whose sum is σ = 11584993920. Its totient is φ = 11501648088.

The previous prime is 11543320963. The next prime is 11543321017. The reversal of 11543321003 is 30012334511.

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

It is a cyclic number.

It is not a de Polignac number, because 11543321003 - 2¹⁰ = 11543319979 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 11543321003.

It is not an unprimeable number, because it can be changed into a prime (11543321063) 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, 20836043 + ... + 20836596.

It is an arithmetic number, because the mean of its divisors is an integer number (2896248480).

Almost surely, 2^11543321003 is an apocalyptic number.

11543321003 is a deficient number, since it is larger than the sum of its proper divisors (41672917).

11543321003 is an equidigital number, since it uses as much as digits as its factorization.

11543321003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41672916.

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 11543321003 its reverse (30012334511), we get a palindrome (41555655514).

The spelling of 11543321003 in words is "eleven billion, five hundred forty-three million, three hundred twenty-one thousand, three".