120345121 has 4 divisors (see below), whose sum is σ = 129602452. Its totient is φ = 111087792.

The previous prime is 120345119. The next prime is 120345149. The reversal of 120345121 is 121543021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121543021 = 8803 ⋅13807.

It can be written as a sum of positive squares in 2 ways, for example, as 28472896 + 91872225 = 5336^2 + 9585^2 .

It is a cyclic number.

It is not a de Polignac number, because 120345121 - 2¹ = 120345119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120345151) 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, 4628646 + ... + 4628671.

It is an arithmetic number, because the mean of its divisors is an integer number (32400613).

Almost surely, 2^120345121 is an apocalyptic number.

It is an amenable number.

120345121 is a deficient number, since it is larger than the sum of its proper divisors (9257331).

120345121 is an equidigital number, since it uses as much as digits as its factorization.

120345121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9257330.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 120345121 is about 10970.1923866448. The cubic root of 120345121 is about 493.7148187078.

Adding to 120345121 its reverse (121543021), we get a palindrome (241888142).

The spelling of 120345121 in words is "one hundred twenty million, three hundred forty-five thousand, one hundred twenty-one".