2120432221 has 2 divisors, whose sum is σ = 2120432222. Its totient is φ = 2120432220.

The previous prime is 2120432191. The next prime is 2120432227. The reversal of 2120432221 is 1222340212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2080363321 + 40068900 = 45611^2 + 6330^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120432221 - 2⁵ = 2120432189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120432227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060216110 + 1060216111.

It is an arithmetic number, because the mean of its divisors is an integer number (1060216111).

Almost surely, 2^2120432221 is an apocalyptic number.

It is an amenable number.

2120432221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120432221 is an equidigital number, since it uses as much as digits as its factorization.

2120432221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2120432221 is about 46048.1511138069. The cubic root of 2120432221 is about 1284.7189544184.

Adding to 2120432221 its reverse (1222340212), we get a palindrome (3342772433).

The spelling of 2120432221 in words is "two billion, one hundred twenty million, four hundred thirty-two thousand, two hundred twenty-one".