120120111 has 16 divisors (see below), whose sum is σ = 178124800. Its totient is φ = 80004024.

The previous prime is 120120097. The next prime is 120120127. The reversal of 120120111 is 111021021.

It is a happy number.

It is not a de Polignac number, because 120120111 - 2¹⁵ = 120087343 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120120093 and 120120102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120120151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52530 + ... + 54768.

It is an arithmetic number, because the mean of its divisors is an integer number (11132800).

Almost surely, 2^120120111 is an apocalyptic number.

120120111 is a deficient number, since it is larger than the sum of its proper divisors (58004689).

120120111 is a wasteful number, since it uses less digits than its factorization.

120120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4235 (or 4229 counting only the distinct ones).

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

The square root of 120120111 is about 10959.9320709574. The cubic root of 120120111 is about 493.4069262118.

Adding to 120120111 its reverse (111021021), we get a palindrome (231141132).

It can be divided in two parts, 1201 and 20111, that added together give a palindrome (21312).

The spelling of 120120111 in words is "one hundred twenty million, one hundred twenty thousand, one hundred eleven".