11123345667989 has 2 divisors, whose sum is σ = 11123345667990. Its totient is φ = 11123345667988.

The previous prime is 11123345667971. The next prime is 11123345667991. The reversal of 11123345667989 is 98976654332111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9325895991889 + 1797449676100 = 3053833^2 + 1340690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11123345667989 is a prime.

Together with 11123345667991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11123345367989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561672833994 + 5561672833995.

It is an arithmetic number, because the mean of its divisors is an integer number (5561672833995).

Almost surely, 2^{11123345667989} is an apocalyptic number.

It is an amenable number.

11123345667989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123345667989 is an equidigital number, since it uses as much as digits as its factorization.

11123345667989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58786560, while the sum is 65.

The spelling of 11123345667989 in words is "eleven trillion, one hundred twenty-three billion, three hundred forty-five million, six hundred sixty-seven thousand, nine hundred eighty-nine".