100033221 has 4 divisors (see below), whose sum is σ = 133377632. Its totient is φ = 66688812.

The previous prime is 100033217. The next prime is 100033223. The reversal of 100033221 is 122330001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 100033221 - 2² = 100033217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100033197 and 100033206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100033223) 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, 16672201 + ... + 16672206.

It is an arithmetic number, because the mean of its divisors is an integer number (33344408).

Almost surely, 2^100033221 is an apocalyptic number.

It is an amenable number.

100033221 is a deficient number, since it is larger than the sum of its proper divisors (33344411).

100033221 is an equidigital number, since it uses as much as digits as its factorization.

100033221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33344410.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 100033221 is about 10001.6609120686. The cubic root of 100033221 is about 464.2102770781.

Adding to 100033221 its reverse (122330001), we get a palindrome (222363222).

The spelling of 100033221 in words is "one hundred million, thirty-three thousand, two hundred twenty-one".