2120422221 has 12 divisors (see below), whose sum is σ = 3065999040. Its totient is φ = 1412153160.

The previous prime is 2120422219. The next prime is 2120422237. The reversal of 2120422221 is 1222240212.

2120422221 is a `hidden beast` number, since 2 + 1 + 20 + 422 + 221 = 666.

It is not a de Polignac number, because 2120422221 - 2¹ = 2120422219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120422194 and 2120422203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120422721) 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 11 ways as a sum of consecutive naturals, for example, 112581 + ... + 130058.

It is an arithmetic number, because the mean of its divisors is an integer number (255499920).

Almost surely, 2^2120422221 is an apocalyptic number.

It is an amenable number.

2120422221 is a deficient number, since it is larger than the sum of its proper divisors (945576819).

2120422221 is a wasteful number, since it uses less digits than its factorization.

2120422221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243616 (or 243613 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 2120422221 is about 46048.0425316864. The cubic root of 2120422221 is about 1284.7169348287.

Adding to 2120422221 its reverse (1222240212), we get a palindrome (3342662433).

The spelling of 2120422221 in words is "two billion, one hundred twenty million, four hundred twenty-two thousand, two hundred twenty-one".