12120111111 has 8 divisors (see below), whose sum is σ = 16177736320. Its totient is φ = 8071279992.

The previous prime is 12120111109. The next prime is 12120111149. The reversal of 12120111111 is 11111102121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12120111111 - 2¹ = 12120111109 is a prime.

It is a Duffinian number.

12120111111 is a modest number, since divided by 111111 gives 12120 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120111151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2195305 + ... + 2200818.

It is an arithmetic number, because the mean of its divisors is an integer number (2022217040).

Almost surely, 2^12120111111 is an apocalyptic number.

12120111111 is a deficient number, since it is larger than the sum of its proper divisors (4057625209).

12120111111 is an equidigital number, since it uses as much as digits as its factorization.

12120111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4397045.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 12120111111 its reverse (11111102121), we get a palindrome (23231213232).

The spelling of 12120111111 in words is "twelve billion, one hundred twenty million, one hundred eleven thousand, one hundred eleven".