10100123 has 4 divisors (see below), whose sum is σ = 11018328. Its totient is φ = 9181920.

The previous prime is 10100117. The next prime is 10100131. The reversal of 10100123 is 32100101.

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

It is not a de Polignac number, because 10100123 - 2⁴ = 10100107 is a prime.

It is a Duffinian number.

10100123 is a modest number, since divided by 123 gives 101 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 10100123.

It is not an unprimeable number, because it can be changed into a prime (10100113) 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, 459086 + ... + 459107.

It is an arithmetic number, because the mean of its divisors is an integer number (2754582).

Almost surely, 2^10100123 is an apocalyptic number.

10100123 is a deficient number, since it is larger than the sum of its proper divisors (918205).

10100123 is an equidigital number, since it uses as much as digits as its factorization.

10100123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918204.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 10100123 is about 3178.0690678461. The cubic root of 10100123 is about 216.1601107690.

Adding to 10100123 its reverse (32100101), we get a palindrome (42200224).

The spelling of 10100123 in words is "ten million, one hundred thousand, one hundred twenty-three".