2120342291 has 2 divisors, whose sum is σ = 2120342292. Its totient is φ = 2120342290.

The previous prime is 2120342269. The next prime is 2120342321. The reversal of 2120342291 is 1922430212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2120342291 - 2⁶ = 2120342227 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2120342291.

It is not a weakly prime, because it can be changed into another prime (2120342201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060171145 + 1060171146.

It is an arithmetic number, because the mean of its divisors is an integer number (1060171146).

Almost surely, 2^2120342291 is an apocalyptic number.

2120342291 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120342291 is an equidigital number, since it uses as much as digits as its factorization.

2120342291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2120342291 is about 46047.1746255946. The cubic root of 2120342291 is about 1284.7007920193.

The spelling of 2120342291 in words is "two billion, one hundred twenty million, three hundred forty-two thousand, two hundred ninety-one".