12120020111 has 4 divisors (see below), whose sum is σ = 12132426432. Its totient is φ = 12107613792.

The previous prime is 12120020057. The next prime is 12120020113. The reversal of 12120020111 is 11102002121.

12120020111 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-12120020111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12120020092 and 12120020101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120020113) 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, 6201695 + ... + 6203648.

It is an arithmetic number, because the mean of its divisors is an integer number (3033106608).

Almost surely, 2^12120020111 is an apocalyptic number.

12120020111 is a deficient number, since it is larger than the sum of its proper divisors (12406321).

12120020111 is an equidigital number, since it uses as much as digits as its factorization.

12120020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12406320.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12120020111 its reverse (11102002121), we get a palindrome (23222022232).

The spelling of 12120020111 in words is "twelve billion, one hundred twenty million, twenty thousand, one hundred eleven".