100120 has 16 divisors (see below), whose sum is σ = 225360. Its totient is φ = 40032.

The previous prime is 100109. The next prime is 100129. The reversal of 100120 is 21001.

It is a Harshad number since it is a multiple of its sum of digits (4).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1212 + ... + 1291.

It is an arithmetic number, because the mean of its divisors is an integer number (14085).

2¹⁰⁰¹²⁰ is an apocalyptic number.

100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100120 is an abundant number, since it is smaller than the sum of its proper divisors (125240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100120 is a wasteful number, since it uses less digits than its factorization.

100120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2514 (or 2510 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 4.

The square root of 100120 is about 316.4174457896. The cubic root of 100120 is about 46.4344472699.

Adding to 100120 its reverse (21001), we get a palindrome (121121).

The spelling of 100120 in words is "one hundred thousand, one hundred twenty", and thus it is an iban number.