2123358161 has 2 divisors, whose sum is σ = 2123358162. Its totient is φ = 2123358160.

The previous prime is 2123358121. The next prime is 2123358169. The reversal of 2123358161 is 1618533212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2114620225 + 8737936 = 45985^2 + 2956^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2123358161 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 (2123358169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061679080 + 1061679081.

It is an arithmetic number, because the mean of its divisors is an integer number (1061679081).

Almost surely, 2^2123358161 is an apocalyptic number.

It is an amenable number.

2123358161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123358161 is an equidigital number, since it uses as much as digits as its factorization.

2123358161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 2123358161 is about 46079.9106010418. The cubic root of 2123358161 is about 1285.3096017514.

The spelling of 2123358161 in words is "two billion, one hundred twenty-three million, three hundred fifty-eight thousand, one hundred sixty-one".