2123123 has 2 divisors, whose sum is σ = 2123124. Its totient is φ = 2123122.

The previous prime is 2123087. The next prime is 2123129. The reversal of 2123123 is 3213212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2123123 - 2¹⁸ = 1860979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2123098 and 2123107.

It is not a weakly prime, because it can be changed into another prime (2123129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061561 + 1061562.

It is an arithmetic number, because the mean of its divisors is an integer number (1061562).

2^2123123 is an apocalyptic number.

2123123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123123 is an equidigital number, since it uses as much as digits as its factorization.

2123123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 14.

The square root of 2123123 is about 1457.0940257924. The cubic root of 2123123 is about 128.5262150838.

Adding to 2123123 its reverse (3213212), we get a palindrome (5336335).

The spelling of 2123123 in words is "two million, one hundred twenty-three thousand, one hundred twenty-three".