120111 has 4 divisors (see below), whose sum is σ = 160152. Its totient is φ = 80072.

The previous prime is 120103. The next prime is 120121. The reversal of 120111 is 111021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 120111 - 2³ = 120103 is a prime.

It is a D-number.

120111 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 120111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20016 + ... + 20021.

It is an arithmetic number, because the mean of its divisors is an integer number (40038).

2¹²⁰¹¹¹ is an apocalyptic number.

120111 is a deficient number, since it is larger than the sum of its proper divisors (40041).

120111 is an equidigital number, since it uses as much as digits as its factorization.

120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40040.

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 120111 is about 346.5703391810. The cubic root of 120111 is about 49.3394451076.

Adding to 120111 its reverse (111021), we get a palindrome (231132).

Multiplying 120111 by its reverse (111021), we get a palindrome (13334843331).

It can be divided in two parts, 120 and 111, that added together give a triangular number (231 = T₂₁).

The spelling of 120111 in words is "one hundred twenty thousand, one hundred eleven", and thus it is an iban number.