121360165 has 4 divisors (see below), whose sum is σ = 145632204. Its totient is φ = 97088128.

The previous prime is 121360159. The next prime is 121360181. The reversal of 121360165 is 561063121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 561063121 = 17 ⋅33003713.

It can be written as a sum of positive squares in 2 ways, for example, as 38950081 + 82410084 = 6241^2 + 9078^2 .

It is a cyclic number.

It is not a de Polignac number, because 121360165 - 2¹⁷ = 121229093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12136012 + ... + 12136021.

It is an arithmetic number, because the mean of its divisors is an integer number (36408051).

Almost surely, 2^121360165 is an apocalyptic number.

It is an amenable number.

121360165 is a deficient number, since it is larger than the sum of its proper divisors (24272039).

121360165 is an equidigital number, since it uses as much as digits as its factorization.

121360165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24272038.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 121360165 is about 11016.3589720016. The cubic root of 121360165 is about 495.0990041062.

The spelling of 121360165 in words is "one hundred twenty-one million, three hundred sixty thousand, one hundred sixty-five".