12121165 has 16 divisors (see below), whose sum is σ = 16708608. Its totient is φ = 8269056.

The previous prime is 12121157. The next prime is 12121211. The reversal of 12121165 is 56112121.

It is a cyclic number.

It is not a de Polignac number, because 12121165 - 2³ = 12121157 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7029 + ... + 8581.

It is an arithmetic number, because the mean of its divisors is an integer number (1044288).

Almost surely, 2^12121165 is an apocalyptic number.

It is an amenable number.

12121165 is a deficient number, since it is larger than the sum of its proper divisors (4587443).

12121165 is a wasteful number, since it uses less digits than its factorization.

12121165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788.

The product of its digits is 120, while the sum is 19.

The square root of 12121165 is about 3481.5463518385. The cubic root of 12121165 is about 229.7108211932.

Adding to 12121165 its reverse (56112121), we get a palindrome (68233286).

It can be divided in two parts, 1212116 and 5, that added together give a palindrome (1212121).

The spelling of 12121165 in words is "twelve million, one hundred twenty-one thousand, one hundred sixty-five".