12101121112111 has 4 divisors (see below), whose sum is σ = 12101480091072. Its totient is φ = 12100762133152.

The previous prime is 12101121112079. The next prime is 12101121112123. The reversal of 12101121112111 is 11121112110121.

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 12101121112111 - 2⁵ = 12101121112079 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 (12101121118111) 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, 179438911 + ... + 179506336.

It is an arithmetic number, because the mean of its divisors is an integer number (3025370022768).

Almost surely, 2^{12101121112111} is an apocalyptic number.

12101121112111 is a deficient number, since it is larger than the sum of its proper divisors (358978961).

12101121112111 is an equidigital number, since it uses as much as digits as its factorization.

12101121112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358978960.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 12101121112111 its reverse (11121112110121), we get a palindrome (23222233222232).

The spelling of 12101121112111 in words is "twelve trillion, one hundred one billion, one hundred twenty-one million, one hundred twelve thousand, one hundred eleven".