102100123 has 2 divisors, whose sum is σ = 102100124. Its totient is φ = 102100122.

The previous prime is 102100111. The next prime is 102100169. The reversal of 102100123 is 321001201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102100123 - 2⁹ = 102099611 is a prime.

It is not a weakly prime, because it can be changed into another prime (102100223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51050061 + 51050062.

It is an arithmetic number, because the mean of its divisors is an integer number (51050062).

Almost surely, 2^102100123 is an apocalyptic number.

102100123 is a deficient number, since it is larger than the sum of its proper divisors (1).

102100123 is an equidigital number, since it uses as much as digits as its factorization.

102100123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 102100123 is about 10104.4605496780. The cubic root of 102100123 is about 467.3857011317.

Adding to 102100123 its reverse (321001201), we get a palindrome (423101324).

The spelling of 102100123 in words is "one hundred two million, one hundred thousand, one hundred twenty-three".