11011111109 has 4 divisors (see below), whose sum is σ = 11014591104. Its totient is φ = 11007631116.

The previous prime is 11011111051. The next prime is 11011111117. The reversal of 11011111109 is 90111111011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90111111011 = 55243 ⋅1631177.

It is a cyclic number.

It is not a de Polignac number, because 11011111109 - 2²⁸ = 10742675653 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 (11011111129) 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, 1735247 + ... + 1741580.

It is an arithmetic number, because the mean of its divisors is an integer number (2753647776).

Almost surely, 2^11011111109 is an apocalyptic number.

It is an amenable number.

11011111109 is a deficient number, since it is larger than the sum of its proper divisors (3479995).

11011111109 is an equidigital number, since it uses as much as digits as its factorization.

11011111109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3479994.

The product of its (nonzero) digits is 9, while the sum is 17.

The spelling of 11011111109 in words is "eleven billion, eleven million, one hundred eleven thousand, one hundred nine".