120012111 has 12 divisors (see below), whose sum is σ = 179771592. Its totient is φ = 80007912.

The previous prime is 120012089. The next prime is 120012131. The reversal of 120012111 is 111210021.

It is a happy number.

It is not a de Polignac number, because 120012111 - 2⁶ = 120012047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 120012093 and 120012102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120012131) 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 11 ways as a sum of consecutive naturals, for example, 246696 + ... + 247181.

It is an arithmetic number, because the mean of its divisors is an integer number (14980966).

Almost surely, 2^120012111 is an apocalyptic number.

120012111 is a deficient number, since it is larger than the sum of its proper divisors (59759481).

120012111 is an frugal number, since it uses more digits than its factorization.

120012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493892 (or 493880 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 120012111 is about 10955.0039251476. The cubic root of 120012111 is about 493.2590078048.

Adding to 120012111 its reverse (111210021), we get a palindrome (231222132).

The spelling of 120012111 in words is "one hundred twenty million, twelve thousand, one hundred eleven".