105100123 has 4 divisors (see below), whose sum is σ = 105571648. Its totient is φ = 104628600.

The previous prime is 105100117. The next prime is 105100129. The reversal of 105100123 is 321001501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321001501 = 23 ⋅13956587.

It is an interprime number because it is at equal distance from previous prime (105100117) and next prime (105100129).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105100123 is a prime.

It is a super-2 number, since 2×105100123² = 22092071709230258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105100129) 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, 235428 + ... + 235873.

It is an arithmetic number, because the mean of its divisors is an integer number (26392912).

Almost surely, 2^105100123 is an apocalyptic number.

105100123 is a deficient number, since it is larger than the sum of its proper divisors (471525).

105100123 is an equidigital number, since it uses as much as digits as its factorization.

105100123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471524.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 105100123 is about 10251.8351040192. The cubic root of 105100123 is about 471.9193026720.

Adding to 105100123 its reverse (321001501), we get a palindrome (426101624).

The spelling of 105100123 in words is "one hundred five million, one hundred thousand, one hundred twenty-three".