102104123 has 4 divisors (see below), whose sum is σ = 111386328. Its totient is φ = 92821920.

The previous prime is 102104113. The next prime is 102104137. The reversal of 102104123 is 321401201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102104123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102104098 and 102104107.

It is not an unprimeable number, because it can be changed into a prime (102104113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4641086 + ... + 4641107.

It is an arithmetic number, because the mean of its divisors is an integer number (27846582).

Almost surely, 2^102104123 is an apocalyptic number.

102104123 is a deficient number, since it is larger than the sum of its proper divisors (9282205).

102104123 is an equidigital number, since it uses as much as digits as its factorization.

102104123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9282204.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 102104123 is about 10104.6584801269. The cubic root of 102104123 is about 467.3918046777.

Adding to 102104123 its reverse (321401201), we get a palindrome (423505324).

The spelling of 102104123 in words is "one hundred two million, one hundred four thousand, one hundred twenty-three".