2120342321 has 2 divisors, whose sum is σ = 2120342322. Its totient is φ = 2120342320.

The previous prime is 2120342291. The next prime is 2120342339. The reversal of 2120342321 is 1232430212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1978470400 + 141871921 = 44480^2 + 11911^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120342321 - 2¹⁰ = 2120341297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120342293 and 2120342302.

It is not a weakly prime, because it can be changed into another prime (2120342381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060171160 + 1060171161.

It is an arithmetic number, because the mean of its divisors is an integer number (1060171161).

Almost surely, 2^2120342321 is an apocalyptic number.

It is an amenable number.

2120342321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120342321 is an equidigital number, since it uses as much as digits as its factorization.

2120342321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2120342321 is about 46047.1749513474. The cubic root of 2120342321 is about 1284.7007980783.

Adding to 2120342321 its reverse (1232430212), we get a palindrome (3352772533).

The spelling of 2120342321 in words is "two billion, one hundred twenty million, three hundred forty-two thousand, three hundred twenty-one".