11321311103 has 4 divisors (see below), whose sum is σ = 11325181920. Its totient is φ = 11317440288.

The previous prime is 11321311087. The next prime is 11321311121. The reversal of 11321311103 is 30111312311.

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 11321311103 - 2⁴ = 11321311087 is a prime.

It is a super-2 number, since 2×11321311103² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11321311153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1931018 + ... + 1936871.

It is an arithmetic number, because the mean of its divisors is an integer number (2831295480).

Almost surely, 2^11321311103 is an apocalyptic number.

11321311103 is a deficient number, since it is larger than the sum of its proper divisors (3870817).

11321311103 is an equidigital number, since it uses as much as digits as its factorization.

11321311103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3870816.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 11321311103 its reverse (30111312311), we get a palindrome (41432623414).

The spelling of 11321311103 in words is "eleven billion, three hundred twenty-one million, three hundred eleven thousand, one hundred three".