11321315243 has 32 divisors (see below), whose sum is σ = 14014640640. Its totient is φ = 8929025280.

The previous prime is 11321315183. The next prime is 11321315251. The reversal of 11321315243 is 34251312311.

It is not a de Polignac number, because 11321315243 - 2¹⁶ = 11321249707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11321315293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1029671 + ... + 1040607.

It is an arithmetic number, because the mean of its divisors is an integer number (437957520).

Almost surely, 2^11321315243 is an apocalyptic number.

11321315243 is a deficient number, since it is larger than the sum of its proper divisors (2693325397).

11321315243 is a wasteful number, since it uses less digits than its factorization.

11321315243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11187.

The product of its digits is 2160, while the sum is 26.

Adding to 11321315243 its reverse (34251312311), we get a palindrome (45572627554).

The spelling of 11321315243 in words is "eleven billion, three hundred twenty-one million, three hundred fifteen thousand, two hundred forty-three".