120201111 has 8 divisors (see below), whose sum is σ = 178075760. Its totient is φ = 80134056.

The previous prime is 120201091. The next prime is 120201119. The reversal of 120201111 is 111102021.

It is a happy number.

It is not a de Polignac number, because 120201111 - 2⁶ = 120201047 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 = 120201093 and 120201102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120201119) 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, 2225920 + ... + 2225973.

It is an arithmetic number, because the mean of its divisors is an integer number (22259470).

Almost surely, 2^120201111 is an apocalyptic number.

120201111 is a deficient number, since it is larger than the sum of its proper divisors (57874649).

120201111 is an equidigital number, since it uses as much as digits as its factorization.

120201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4451902 (or 4451896 counting only the distinct ones).

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

The square root of 120201111 is about 10963.6267265901. The cubic root of 120201111 is about 493.5178068426.

Adding to 120201111 its reverse (111102021), we get a palindrome (231303132).

It can be divided in two parts, 12020 and 1111, that added together give a palindrome (13131).

The spelling of 120201111 in words is "one hundred twenty million, two hundred one thousand, one hundred eleven".