11503321103 has 2 divisors, whose sum is σ = 11503321104. Its totient is φ = 11503321102.

The previous prime is 11503321019. The next prime is 11503321129. The reversal of 11503321103 is 30112330511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11503321103 - 2⁸ = 11503320847 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11503321153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5751660551 + 5751660552.

It is an arithmetic number, because the mean of its divisors is an integer number (5751660552).

Almost surely, 2^11503321103 is an apocalyptic number.

11503321103 is a deficient number, since it is larger than the sum of its proper divisors (1).

11503321103 is an equidigital number, since it uses as much as digits as its factorization.

11503321103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 20.

Adding to 11503321103 its reverse (30112330511), we get a palindrome (41615651614).

The spelling of 11503321103 in words is "eleven billion, five hundred three million, three hundred twenty-one thousand, one hundred three".