12100111220111 has 4 divisors (see below), whose sum is σ = 12100130710800. Its totient is φ = 12100091729424.

The previous prime is 12100111220077. The next prime is 12100111220129. The reversal of 12100111220111 is 11102211100121.

12100111220111 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12100111220111 is a prime.

It is a super-2 number, since 2×12100111220111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100111220311) 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, 8782406 + ... + 10066323.

It is an arithmetic number, because the mean of its divisors is an integer number (3025032677700).

Almost surely, 2^{12100111220111} is an apocalyptic number.

12100111220111 is a deficient number, since it is larger than the sum of its proper divisors (19490689).

12100111220111 is an equidigital number, since it uses as much as digits as its factorization.

12100111220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19490688.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 12100111220111 its reverse (11102211100121), we get a palindrome (23202322320232).

The spelling of 12100111220111 in words is "twelve trillion, one hundred billion, one hundred eleven million, two hundred twenty thousand, one hundred eleven".