2180210121 has 32 divisors (see below), whose sum is σ = 3278750720. Its totient is φ = 1431654912.

The previous prime is 2180210113. The next prime is 2180210141. The reversal of 2180210121 is 1210120812.

It is not a de Polignac number, because 2180210121 - 2³ = 2180210113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2180210094 and 2180210103.

It is not an unprimeable number, because it can be changed into a prime (2180210141) 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 31 ways as a sum of consecutive naturals, for example, 582171 + ... + 585903.

It is an arithmetic number, because the mean of its divisors is an integer number (102460960).

Almost surely, 2^2180210121 is an apocalyptic number.

It is an amenable number.

2180210121 is a deficient number, since it is larger than the sum of its proper divisors (1098540599).

2180210121 is a wasteful number, since it uses less digits than its factorization.

2180210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4062 (or 4056 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 2180210121 is about 46692.7202141833. The cubic root of 2180210121 is about 1296.6799147990.

Adding to 2180210121 its reverse (1210120812), we get a palindrome (3390330933).

The spelling of 2180210121 in words is "two billion, one hundred eighty million, two hundred ten thousand, one hundred twenty-one".