100220123 has 4 divisors (see below), whose sum is σ = 100288920. Its totient is φ = 100151328.

The previous prime is 100220119. The next prime is 100220129. The reversal of 100220123 is 321022001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321022001 = 179 ⋅1793419.

It is a cyclic number.

It is not a de Polignac number, because 100220123 - 2² = 100220119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100220129) 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, 32165 + ... + 35142.

It is an arithmetic number, because the mean of its divisors is an integer number (25072230).

Almost surely, 2^100220123 is an apocalyptic number.

100220123 is a deficient number, since it is larger than the sum of its proper divisors (68797).

100220123 is an equidigital number, since it uses as much as digits as its factorization.

100220123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68796.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 100220123 is about 10011.0000998901. Note that the first 4 decimals coincide. The cubic root of 100220123 is about 464.4992072592.

Adding to 100220123 its reverse (321022001), we get a palindrome (421242124).

The spelling of 100220123 in words is "one hundred million, two hundred twenty thousand, one hundred twenty-three".