2120332221 has 28 divisors (see below), whose sum is σ = 3633201952. Its totient is φ = 1211615496.

The previous prime is 2120332217. The next prime is 2120332267. The reversal of 2120332221 is 1222330212.

It is not a de Polignac number, because 2120332221 - 2² = 2120332217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2120332194 and 2120332203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120334221) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 202651 + ... + 212856.

Almost surely, 2^2120332221 is an apocalyptic number.

2120332221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2120332221 is a deficient number, since it is larger than the sum of its proper divisors (1512869731).

2120332221 is an frugal number, since it uses more digits than its factorization.

2120332221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415532 (or 415517 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2120332221 is about 46047.0652810795. The cubic root of 2120332221 is about 1284.6987582349.

Adding to 2120332221 its reverse (1222330212), we get a palindrome (3342662433).

The spelling of 2120332221 in words is "two billion, one hundred twenty million, three hundred thirty-two thousand, two hundred twenty-one".