100123012123 has 4 divisors (see below), whose sum is σ = 105392644360. Its totient is φ = 94853379888.

The previous prime is 100123012109. The next prime is 100123012159. The reversal of 100123012123 is 321210321001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321210321001 = 200657 ⋅1600793.

It is not a de Polignac number, because 100123012123 - 2²⁹ = 99586141211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100123012097 and 100123012106.

It is not an unprimeable number, because it can be changed into a prime (100123012163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2634816090 + ... + 2634816127.

It is an arithmetic number, because the mean of its divisors is an integer number (26348161090).

Almost surely, 2^100123012123 is an apocalyptic number.

100123012123 is a deficient number, since it is larger than the sum of its proper divisors (5269632237).

100123012123 is an equidigital number, since it uses as much as digits as its factorization.

100123012123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5269632236.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 100123012123 its reverse (321210321001), we get a palindrome (421333333124).

The spelling of 100123012123 in words is "one hundred billion, one hundred twenty-three million, twelve thousand, one hundred twenty-three".