100213221 has 8 divisors (see below), whose sum is σ = 133710400. Its totient is φ = 66762432.

The previous prime is 100213213. The next prime is 100213237. The reversal of 100213221 is 122312001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100213221 - 2³ = 100213213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100213197 and 100213206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100213261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6196 + ... + 15453.

It is an arithmetic number, because the mean of its divisors is an integer number (16713800).

Almost surely, 2^100213221 is an apocalyptic number.

It is an amenable number.

100213221 is a deficient number, since it is larger than the sum of its proper divisors (33497179).

100213221 is a wasteful number, since it uses less digits than its factorization.

100213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23195.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 100213221 is about 10010.6553731512. The cubic root of 100213221 is about 464.4885439079.

Adding to 100213221 its reverse (122312001), we get a palindrome (222525222).

The spelling of 100213221 in words is "one hundred million, two hundred thirteen thousand, two hundred twenty-one".