2121123163 has 2 divisors, whose sum is σ = 2121123164. Its totient is φ = 2121123162.

The previous prime is 2121123131. The next prime is 2121123211. The reversal of 2121123163 is 3613211212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121123163 - 2⁵ = 2121123131 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121123863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060561581 + 1060561582.

It is an arithmetic number, because the mean of its divisors is an integer number (1060561582).

Almost surely, 2^2121123163 is an apocalyptic number.

2121123163 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121123163 is an equidigital number, since it uses as much as digits as its factorization.

2121123163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 22.

The square root of 2121123163 is about 46055.6528886520. The cubic root of 2121123163 is about 1284.8584809856.

Adding to 2121123163 its reverse (3613211212), we get a palindrome (5734334375).

The spelling of 2121123163 in words is "two billion, one hundred twenty-one million, one hundred twenty-three thousand, one hundred sixty-three".