100013123 has 4 divisors (see below), whose sum is σ = 114300720. Its totient is φ = 85725528.

The previous prime is 100013113. The next prime is 100013143. The reversal of 100013123 is 321310001.

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

It is not a de Polignac number, because 100013123 - 2¹⁶ = 99947587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100013113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7143788 + ... + 7143801.

It is an arithmetic number, because the mean of its divisors is an integer number (28575180).

Almost surely, 2^100013123 is an apocalyptic number.

100013123 is a deficient number, since it is larger than the sum of its proper divisors (14287597).

100013123 is an equidigital number, since it uses as much as digits as its factorization.

100013123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14287596.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 100013123 is about 10000.6561284748. The cubic root of 100013123 is about 464.1791863299.

Adding to 100013123 its reverse (321310001), we get a palindrome (421323124).

The spelling of 100013123 in words is "one hundred million, thirteen thousand, one hundred twenty-three".