2120700161 has 2 divisors, whose sum is σ = 2120700162. Its totient is φ = 2120700160.

The previous prime is 2120700157. The next prime is 2120700193. The reversal of 2120700161 is 1610070212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2074255936 + 46444225 = 45544^2 + 6815^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120700161 - 2² = 2120700157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2120700761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060350080 + 1060350081.

It is an arithmetic number, because the mean of its divisors is an integer number (1060350081).

Almost surely, 2^2120700161 is an apocalyptic number.

It is an amenable number.

2120700161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120700161 is an equidigital number, since it uses as much as digits as its factorization.

2120700161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 2120700161 is about 46051.0603678135. The cubic root of 2120700161 is about 1284.7730649429.

Adding to 2120700161 its reverse (1610070212), we get a palindrome (3730770373).

The spelling of 2120700161 in words is "two billion, one hundred twenty million, seven hundred thousand, one hundred sixty-one".