11131965503 has 4 divisors (see below), whose sum is σ = 11151530160. Its totient is φ = 11112400848.

The previous prime is 11131965451. The next prime is 11131965539. The reversal of 11131965503 is 30556913111.

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 11131965503 - 2¹⁴ = 11131949119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131965563) 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, 9781475 + ... + 9782612.

It is an arithmetic number, because the mean of its divisors is an integer number (2787882540).

Almost surely, 2^11131965503 is an apocalyptic number.

11131965503 is a deficient number, since it is larger than the sum of its proper divisors (19564657).

11131965503 is an equidigital number, since it uses as much as digits as its factorization.

11131965503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19564656.

The product of its (nonzero) digits is 12150, while the sum is 35.

The spelling of 11131965503 in words is "eleven billion, one hundred thirty-one million, nine hundred sixty-five thousand, five hundred three".