201212165 has 64 divisors (see below), whose sum is σ = 324698112. Its totient is φ = 115948800.

The previous prime is 201212161. The next prime is 201212273. The reversal of 201212165 is 561212102.

201212165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 201212165 - 2² = 201212161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201212161) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 274139 + ... + 274871.

It is an arithmetic number, because the mean of its divisors is an integer number (5073408).

Almost surely, 2^201212165 is an apocalyptic number.

It is an amenable number.

201212165 is a deficient number, since it is larger than the sum of its proper divisors (123485947).

201212165 is a wasteful number, since it uses less digits than its factorization.

201212165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 201212165 is about 14184.9273879002. The cubic root of 201212165 is about 585.9826327522.

Adding to 201212165 its reverse (561212102), we get a palindrome (762424267).

The spelling of 201212165 in words is "two hundred one million, two hundred twelve thousand, one hundred sixty-five".