210123103120123 has 2 divisors, whose sum is σ = 210123103120124. Its totient is φ = 210123103120122.

The previous prime is 210123103120121. The next prime is 210123103120129. The reversal of 210123103120123 is 321021301321012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 210123103120123 - 2¹ = 210123103120121 is a prime.

Together with 210123103120121, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 210123103120094 and 210123103120103.

It is not a weakly prime, because it can be changed into another prime (210123103120121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105061551560061 + 105061551560062.

It is an arithmetic number, because the mean of its divisors is an integer number (105061551560062).

Almost surely, 2^{210123103120123} is an apocalyptic number.

210123103120123 is a deficient number, since it is larger than the sum of its proper divisors (1).

210123103120123 is an equidigital number, since it uses as much as digits as its factorization.

210123103120123 is an evil number, because the sum of its binary digits is even.

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

Adding to 210123103120123 its reverse (321021301321012), we get a palindrome (531144404441135).

The spelling of 210123103120123 in words is "two hundred ten trillion, one hundred twenty-three billion, one hundred three million, one hundred twenty thousand, one hundred twenty-three".