100220 has 12 divisors (see below), whose sum is σ = 210504. Its totient is φ = 40080.

The previous prime is 100213. The next prime is 100237. The reversal of 100220 is 22001.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a congruent number.

It is an unprimeable number.

100220 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2486 + ... + 2525.

It is an arithmetic number, because the mean of its divisors is an integer number (17542).

2¹⁰⁰²²⁰ is an apocalyptic number.

100220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100220 is an abundant number, since it is smaller than the sum of its proper divisors (110284).

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

100220 is a wasteful number, since it uses less digits than its factorization.

100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5020 (or 5018 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 100220 is about 316.5754254518. The cubic root of 100220 is about 46.4499017233.

Adding to 100220 its reverse (22001), we get a palindrome (122221).

The spelling of 100220 in words is "one hundred thousand, two hundred twenty", and thus it is an iban number.