100120123 has 4 divisors (see below), whose sum is σ = 106009560. Its totient is φ = 94230688.

The previous prime is 100120091. The next prime is 100120159. The reversal of 100120123 is 321021001.

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

It is a cyclic number.

It is not a de Polignac number, because 100120123 - 2⁵ = 100120091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100120183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2944693 + ... + 2944726.

It is an arithmetic number, because the mean of its divisors is an integer number (26502390).

Almost surely, 2^100120123 is an apocalyptic number.

100120123 is a deficient number, since it is larger than the sum of its proper divisors (5889437).

100120123 is an equidigital number, since it uses as much as digits as its factorization.

100120123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5889436.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 100120123 is about 10006.0043473906. The cubic root of 100120123 is about 464.3446628516.

Adding to 100120123 its reverse (321021001), we get a palindrome (421141124).

The spelling of 100120123 in words is "one hundred million, one hundred twenty thousand, one hundred twenty-three".