12111101111101 has 4 divisors (see below), whose sum is σ = 12111108732252. Its totient is φ = 12111093489952.

The previous prime is 12111101111063. The next prime is 12111101111113. The reversal of 12111101111101 is 10111110111121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 386571819001 + 11724529292100 = 621749^2 + 3424110^2 .

It is a cyclic number.

It is not a de Polignac number, because 12111101111101 - 2¹¹ = 12111101109053 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 (12111101111201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423040 + ... + 4939753.

It is an arithmetic number, because the mean of its divisors is an integer number (3027777183063).

Almost surely, 2^{12111101111101} is an apocalyptic number.

It is an amenable number.

12111101111101 is a deficient number, since it is larger than the sum of its proper divisors (7621151).

12111101111101 is an equidigital number, since it uses as much as digits as its factorization.

12111101111101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7621150.

The product of its (nonzero) digits is 2, while the sum is 13.

Adding to 12111101111101 its reverse (10111110111121), we get a palindrome (22222211222222).

The spelling of 12111101111101 in words is "twelve trillion, one hundred eleven billion, one hundred one million, one hundred eleven thousand, one hundred one".