2123206123 has 2 divisors, whose sum is σ = 2123206124. Its totient is φ = 2123206122.

The previous prime is 2123206073. The next prime is 2123206147. The reversal of 2123206123 is 3216023212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2123206123 - 2⁹ = 2123205611 is a prime.

It is a super-2 number, since 2×2123206123² = 9016008481489382258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2123206094 and 2123206103.

It is not a weakly prime, because it can be changed into another prime (2123246123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061603061 + 1061603062.

It is an arithmetic number, because the mean of its divisors is an integer number (1061603062).

Almost surely, 2^2123206123 is an apocalyptic number.

2123206123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123206123 is an equidigital number, since it uses as much as digits as its factorization.

2123206123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 2123206123 is about 46078.2608504271. The cubic root of 2123206123 is about 1285.2789238424.

Adding to 2123206123 its reverse (3216023212), we get a palindrome (5339229335).

The spelling of 2123206123 in words is "two billion, one hundred twenty-three million, two hundred six thousand, one hundred twenty-three".