120170121 has 4 divisors (see below), whose sum is σ = 160226832. Its totient is φ = 80113412.

The previous prime is 120170111. The next prime is 120170129. The reversal of 120170121 is 121071021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120170121 - 2¹³ = 120161929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120170121.

It is not an unprimeable number, because it can be changed into a prime (120170129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20028351 + ... + 20028356.

It is an arithmetic number, because the mean of its divisors is an integer number (40056708).

Almost surely, 2^120170121 is an apocalyptic number.

It is an amenable number.

120170121 is a deficient number, since it is larger than the sum of its proper divisors (40056711).

120170121 is an equidigital number, since it uses as much as digits as its factorization.

120170121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40056710.

The product of its (nonzero) digits is 28, while the sum is 15.

The square root of 120170121 is about 10962.2133257842. The cubic root of 120170121 is about 493.4753906196.

The spelling of 120170121 in words is "one hundred twenty million, one hundred seventy thousand, one hundred twenty-one".