111211100000111 has 4 divisors (see below), whose sum is σ = 111222486423312. Its totient is φ = 111199713576912.

The previous prime is 111211100000093. The next prime is 111211100000123. The reversal of 111211100000111 is 111000001112111.

It is a happy number.

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 111211100000111 - 2¹⁴ = 111211099983727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111211100000092 and 111211100000101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111211100000171) 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, 5693196950 + ... + 5693216483.

It is an arithmetic number, because the mean of its divisors is an integer number (27805621605828).

Almost surely, 2^{111211100000111} is an apocalyptic number.

111211100000111 is a deficient number, since it is larger than the sum of its proper divisors (11386423201).

111211100000111 is an equidigital number, since it uses as much as digits as its factorization.

111211100000111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11386423200.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 111211100000111 its reverse (111000001112111), we get a palindrome (222211101112222).

The spelling of 111211100000111 in words is "one hundred eleven trillion, two hundred eleven billion, one hundred million, one hundred eleven", and thus it is an aban number.