100123123 has 2 divisors, whose sum is σ = 100123124. Its totient is φ = 100123122.

The previous prime is 100123097. The next prime is 100123157. The reversal of 100123123 is 321321001.

It is a weak prime.

It is an emirp because it is prime and its reverse (321321001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100123123 - 2¹⁷ = 99992051 is a prime.

It is not a weakly prime, because it can be changed into another prime (100123193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50061561 + 50061562.

It is an arithmetic number, because the mean of its divisors is an integer number (50061562).

Almost surely, 2^100123123 is an apocalyptic number.

100123123 is a deficient number, since it is larger than the sum of its proper divisors (1).

100123123 is an equidigital number, since it uses as much as digits as its factorization.

100123123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 100123123 is about 10006.1542562565. The cubic root of 100123123 is about 464.3493006808.

Adding to 100123123 its reverse (321321001), we get a palindrome (421444124).

The spelling of 100123123 in words is "one hundred million, one hundred twenty-three thousand, one hundred twenty-three".