11003231321 has 4 divisors (see below), whose sum is σ = 11009825700. Its totient is φ = 10996636944.

The previous prime is 11003231299. The next prime is 11003231333. The reversal of 11003231321 is 12313230011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12313230011 = 89 ⋅138350899.

It can be written as a sum of positive squares in 2 ways, for example, as 2974175296 + 8029056025 = 54536^2 + 89605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11003231321 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 11003231321.

It is not an unprimeable number, because it can be changed into a prime (11003231021) 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, 3294686 + ... + 3298023.

It is an arithmetic number, because the mean of its divisors is an integer number (2752456425).

Almost surely, 2^11003231321 is an apocalyptic number.

It is an amenable number.

11003231321 is a deficient number, since it is larger than the sum of its proper divisors (6594379).

11003231321 is an equidigital number, since it uses as much as digits as its factorization.

11003231321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6594378.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 11003231321 its reverse (12313230011), we get a palindrome (23316461332).

The spelling of 11003231321 in words is "eleven billion, three million, two hundred thirty-one thousand, three hundred twenty-one".