12120423111 has 12 divisors (see below), whose sum is σ = 17980447992. Its totient is φ = 7861895856.

The previous prime is 12120423097. The next prime is 12120423113. The reversal of 12120423111 is 11132402121.

12120423111 is a `hidden beast` number, since 12 + 120 + 423 + 111 = 666.

It is not a de Polignac number, because 12120423111 - 2¹³ = 12120414919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120423113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18198501 + ... + 18199166.

It is an arithmetic number, because the mean of its divisors is an integer number (1498370666).

Almost surely, 2^12120423111 is an apocalyptic number.

12120423111 is a deficient number, since it is larger than the sum of its proper divisors (5860024881).

12120423111 is a wasteful number, since it uses less digits than its factorization.

12120423111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36397710 (or 36397707 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 12120423111 its reverse (11132402121), we get a palindrome (23252825232).

The spelling of 12120423111 in words is "twelve billion, one hundred twenty million, four hundred twenty-three thousand, one hundred eleven".