11211340111 has 4 divisors (see below), whose sum is σ = 11211562672. Its totient is φ = 11211117552.

The previous prime is 11211340099. The next prime is 11211340117. The reversal of 11211340111 is 11104311211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11211340111 - 2⁹ = 11211339599 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 (11211340117) 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, 4291 + ... + 149803.

It is an arithmetic number, because the mean of its divisors is an integer number (2802890668).

Almost surely, 2^11211340111 is an apocalyptic number.

11211340111 is a deficient number, since it is larger than the sum of its proper divisors (222561).

11211340111 is an equidigital number, since it uses as much as digits as its factorization.

11211340111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222560.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 11211340111 its reverse (11104311211), we get a palindrome (22315651322).

The spelling of 11211340111 in words is "eleven billion, two hundred eleven million, three hundred forty thousand, one hundred eleven".