11099980813 has 2 divisors, whose sum is σ = 11099980814. Its totient is φ = 11099980812.

The previous prime is 11099980783. The next prime is 11099980831. The reversal of 11099980813 is 31808999011.

It is a happy number.

Together with next prime (11099980831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7022775204 + 4077205609 = 83802^2 + 63853^2 .

It is a cyclic number.

It is not a de Polignac number, because 11099980813 - 2⁹ = 11099980301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11099980613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5549990406 + 5549990407.

It is an arithmetic number, because the mean of its divisors is an integer number (5549990407).

Almost surely, 2^11099980813 is an apocalyptic number.

It is an amenable number.

11099980813 is a deficient number, since it is larger than the sum of its proper divisors (1).

11099980813 is an equidigital number, since it uses as much as digits as its factorization.

11099980813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 49.

The spelling of 11099980813 in words is "eleven billion, ninety-nine million, nine hundred eighty thousand, eight hundred thirteen".