11243299991 has 16 divisors (see below), whose sum is σ = 14038891008. Its totient is φ = 8747719200.

The previous prime is 11243299981. The next prime is 11243299997. The reversal of 11243299991 is 19999234211.

11243299991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-11243299991 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 (11243299997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59555 + ... + 161348.

It is an arithmetic number, because the mean of its divisors is an integer number (877430688).

Almost surely, 2^11243299991 is an apocalyptic number.

11243299991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11243299991 is a deficient number, since it is larger than the sum of its proper divisors (2795591017).

11243299991 is a wasteful number, since it uses less digits than its factorization.

11243299991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221582.

The product of its digits is 314928, while the sum is 50.

The spelling of 11243299991 in words is "eleven billion, two hundred forty-three million, two hundred ninety-nine thousand, nine hundred ninety-one".