11311042243 has 4 divisors (see below), whose sum is σ = 11312438760. Its totient is φ = 11309645728.

The previous prime is 11311042229. The next prime is 11311042271. The reversal of 11311042243 is 34224011311.

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 11311042243 - 2³³ = 2721107651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11311042213) 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, 686038 + ... + 702331.

It is an arithmetic number, because the mean of its divisors is an integer number (2828109690).

Almost surely, 2^11311042243 is an apocalyptic number.

11311042243 is a deficient number, since it is larger than the sum of its proper divisors (1396517).

11311042243 is an equidigital number, since it uses as much as digits as its factorization.

11311042243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396516.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 11311042243 its reverse (34224011311), we get a palindrome (45535053554).

The spelling of 11311042243 in words is "eleven billion, three hundred eleven million, forty-two thousand, two hundred forty-three".