12111200112111 has 4 divisors (see below), whose sum is σ = 16148266816152. Its totient is φ = 8074133408072.

The previous prime is 12111200112103. The next prime is 12111200112149. The reversal of 12111200112111 is 11121100211121.

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 12111200112111 - 2³ = 12111200112103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111200112911) 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, 2018533352016 + ... + 2018533352021.

It is an arithmetic number, because the mean of its divisors is an integer number (4037066704038).

Almost surely, 2^{12111200112111} is an apocalyptic number.

12111200112111 is a deficient number, since it is larger than the sum of its proper divisors (4037066704041).

12111200112111 is an equidigital number, since it uses as much as digits as its factorization.

12111200112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4037066704040.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 12111200112111 its reverse (11121100211121), we get a palindrome (23232300323232).

The spelling of 12111200112111 in words is "twelve trillion, one hundred eleven billion, two hundred million, one hundred twelve thousand, one hundred eleven".