100304221 has 4 divisors (see below), whose sum is σ = 100404252. Its totient is φ = 100204192.

The previous prime is 100304213. The next prime is 100304279. The reversal of 100304221 is 122403001.

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

It can be written as a sum of positive squares in 2 ways, for example, as 84100 + 100220121 = 290^2 + 10011^2 .

It is a cyclic number.

It is not a de Polignac number, because 100304221 - 2³ = 100304213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100304201) 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, 48496 + ... + 50521.

It is an arithmetic number, because the mean of its divisors is an integer number (25101063).

Almost surely, 2^100304221 is an apocalyptic number.

It is an amenable number.

100304221 is a deficient number, since it is larger than the sum of its proper divisors (100031).

100304221 is an equidigital number, since it uses as much as digits as its factorization.

100304221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100030.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 100304221 is about 10015.1994987619. The cubic root of 100304221 is about 464.6290964530.

Adding to 100304221 its reverse (122403001), we get a palindrome (222707222).

The spelling of 100304221 in words is "one hundred million, three hundred four thousand, two hundred twenty-one".