2120123123 has 2 divisors, whose sum is σ = 2120123124. Its totient is φ = 2120123122.

The previous prime is 2120123107. The next prime is 2120123129. The reversal of 2120123123 is 3213210212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2120123123 - 2⁴ = 2120123107 is a prime.

It is not a weakly prime, because it can be changed into another prime (2120123129) 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, 1060061561 + 1060061562.

It is an arithmetic number, because the mean of its divisors is an integer number (1060061562).

Almost surely, 2^2120123123 is an apocalyptic number.

2120123123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120123123 is an equidigital number, since it uses as much as digits as its factorization.

2120123123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2120123123 is about 46044.7947438144. The cubic root of 2120123123 is about 1284.6565263668.

Adding to 2120123123 its reverse (3213210212), we get a palindrome (5333333335).

The spelling of 2120123123 in words is "two billion, one hundred twenty million, one hundred twenty-three thousand, one hundred twenty-three".