2120165121 has 8 divisors (see below), whose sum is σ = 2827218400. Its totient is φ = 1413277632.

The previous prime is 2120165101. The next prime is 2120165143. The reversal of 2120165121 is 1215610212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-2120165121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120165101) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7675 + ... + 65568.

It is an arithmetic number, because the mean of its divisors is an integer number (353402300).

Almost surely, 2^2120165121 is an apocalyptic number.

It is an amenable number.

2120165121 is a deficient number, since it is larger than the sum of its proper divisors (707053279).

2120165121 is an equidigital number, since it uses as much as digits as its factorization.

2120165121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82895.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 2120165121 is about 46045.2507974492. The cubic root of 2120165121 is about 1284.6650089950.

Adding to 2120165121 its reverse (1215610212), we get a palindrome (3335775333).

The spelling of 2120165121 in words is "two billion, one hundred twenty million, one hundred sixty-five thousand, one hundred twenty-one".