12122101111 has 4 divisors (see below), whose sum is σ = 12122649000. Its totient is φ = 12121553224.

The previous prime is 12122101063. The next prime is 12122101139. The reversal of 12122101111 is 11110122121.

It is a happy number.

12122101111 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 not a de Polignac number, because 12122101111 - 2¹⁷ = 12121970039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12122101091 and 12122101100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122141111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239296 + ... + 285493.

It is an arithmetic number, because the mean of its divisors is an integer number (3030662250).

Almost surely, 2^12122101111 is an apocalyptic number.

12122101111 is a deficient number, since it is larger than the sum of its proper divisors (547889).

12122101111 is an equidigital number, since it uses as much as digits as its factorization.

12122101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547888.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12122101111 its reverse (11110122121), we get a palindrome (23232223232).

The spelling of 12122101111 in words is "twelve billion, one hundred twenty-two million, one hundred one thousand, one hundred eleven".