120111001 has 6 divisors (see below), whose sum is σ = 127592270. Its totient is φ = 113045376.

The previous prime is 120110993. The next prime is 120111007. The reversal of 120111001 is 100111021.

It can be written as a sum of positive squares in 3 ways, for example, as 32501401 + 87609600 = 5701^2 + 9360^2 .

It is not a de Polignac number, because 120111001 - 2³ = 120110993 is a prime.

It is a super-2 number, since 2×120111001² = 28853305122444002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120111007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 207516 + ... + 208093.

Almost surely, 2^120111001 is an apocalyptic number.

It is an amenable number.

120111001 is a deficient number, since it is larger than the sum of its proper divisors (7481269).

120111001 is an equidigital number, since it uses as much as digits as its factorization.

120111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415643 (or 415626 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 120111001 is about 10959.5164583115. The cubic root of 120111001 is about 493.3944524451.

Adding to 120111001 its reverse (100111021), we get a palindrome (220222022).

The spelling of 120111001 in words is "one hundred twenty million, one hundred eleven thousand, one".