102040123 has 4 divisors (see below), whose sum is σ = 102463768. Its totient is φ = 101616480.

The previous prime is 102040093. The next prime is 102040157. The reversal of 102040123 is 321040201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321040201 = 3881 ⋅82721.

It is a cyclic number.

It is not a de Polignac number, because 102040123 - 2⁵ = 102040091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102040723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211461 + ... + 211942.

It is an arithmetic number, because the mean of its divisors is an integer number (25615942).

Almost surely, 2^102040123 is an apocalyptic number.

102040123 is a deficient number, since it is larger than the sum of its proper divisors (423645).

102040123 is an equidigital number, since it uses as much as digits as its factorization.

102040123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423644.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 102040123 is about 10101.4911275514. The cubic root of 102040123 is about 467.2941288061.

Adding to 102040123 its reverse (321040201), we get a palindrome (423080324).

The spelling of 102040123 in words is "one hundred two million, forty thousand, one hundred twenty-three".