11091111013 has 2 divisors, whose sum is σ = 11091111014. Its totient is φ = 11091111012.

The previous prime is 11091111011. The next prime is 11091111019. The reversal of 11091111013 is 31011119011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7848719649 + 3242391364 = 88593^2 + 56942^2 .

It is a cyclic number.

It is not a de Polignac number, because 11091111013 - 2¹ = 11091111011 is a prime.

Together with 11091111011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11091111011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5545555506 + 5545555507.

It is an arithmetic number, because the mean of its divisors is an integer number (5545555507).

Almost surely, 2^11091111013 is an apocalyptic number.

It is an amenable number.

11091111013 is a deficient number, since it is larger than the sum of its proper divisors (1).

11091111013 is an equidigital number, since it uses as much as digits as its factorization.

11091111013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27, while the sum is 19.

The spelling of 11091111013 in words is "eleven billion, ninety-one million, one hundred eleven thousand, thirteen".