11199961111 has 4 divisors (see below), whose sum is σ = 11200211712. Its totient is φ = 11199710512.

The previous prime is 11199961099. The next prime is 11199961127. The reversal of 11199961111 is 11116999111.

11199961111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11116999111 = 6763 ⋅1643797.

It is a cyclic number.

It is not a de Polignac number, because 11199961111 - 2¹¹ = 11199959063 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 (11199961411) 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 3 ways as a sum of consecutive naturals, for example, 37975 + ... + 154408.

It is an arithmetic number, because the mean of its divisors is an integer number (2800052928).

Almost surely, 2^11199961111 is an apocalyptic number.

11199961111 is a deficient number, since it is larger than the sum of its proper divisors (250601).

11199961111 is an equidigital number, since it uses as much as digits as its factorization.

11199961111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250600.

The product of its digits is 4374, while the sum is 40.

The spelling of 11199961111 in words is "eleven billion, one hundred ninety-nine million, nine hundred sixty-one thousand, one hundred eleven".