121161165 has 16 divisors (see below), whose sum is σ = 194695488. Its totient is φ = 64340096.

The previous prime is 121161163. The next prime is 121161181. The reversal of 121161165 is 561161121.

It is a cyclic number.

It is not a de Polignac number, because 121161165 - 2¹ = 121161163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121161163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13839 + ... + 20828.

It is an arithmetic number, because the mean of its divisors is an integer number (12168468).

Almost surely, 2^121161165 is an apocalyptic number.

121161165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121161165 is a deficient number, since it is larger than the sum of its proper divisors (73534323).

121161165 is a wasteful number, since it uses less digits than its factorization.

121161165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34908.

The product of its digits is 360, while the sum is 24.

The square root of 121161165 is about 11007.3232440953. The cubic root of 121161165 is about 494.8282436448.

The spelling of 121161165 in words is "one hundred twenty-one million, one hundred sixty-one thousand, one hundred sixty-five".