2120345291 has 2 divisors, whose sum is σ = 2120345292. Its totient is φ = 2120345290.

The previous prime is 2120345267. The next prime is 2120345317. The reversal of 2120345291 is 1925430212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2120345291 - 2¹⁰ = 2120344267 is a prime.

It is not a weakly prime, because it can be changed into another prime (2120345231) 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, 1060172645 + 1060172646.

It is an arithmetic number, because the mean of its divisors is an integer number (1060172646).

Almost surely, 2^2120345291 is an apocalyptic number.

2120345291 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120345291 is an equidigital number, since it uses as much as digits as its factorization.

2120345291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 2120345291 is about 46047.2072008716. The cubic root of 2120345291 is about 1284.7013979121.

The spelling of 2120345291 in words is "two billion, one hundred twenty million, three hundred forty-five thousand, two hundred ninety-one".