2120241221 has 12 divisors (see below), whose sum is σ = 2467620288. Its totient is φ = 1816452792.

The previous prime is 2120241209. The next prime is 2120241247. The reversal of 2120241221 is 1221420212.

It is not a de Polignac number, because 2120241221 - 2¹⁴ = 2120224837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2120241221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120241271) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 101540 + ... + 120626.

It is an arithmetic number, because the mean of its divisors is an integer number (205635024).

Almost surely, 2^2120241221 is an apocalyptic number.

It is an amenable number.

2120241221 is a deficient number, since it is larger than the sum of its proper divisors (347379067).

2120241221 is a wasteful number, since it uses less digits than its factorization.

2120241221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21368 (or 21361 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2120241221 is about 46046.0771510451. The cubic root of 2120241221 is about 1284.6803791560.

Adding to 2120241221 its reverse (1221420212), we get a palindrome (3341661433).

The spelling of 2120241221 in words is "two billion, one hundred twenty million, two hundred forty-one thousand, two hundred twenty-one".