100032221 has 4 divisors (see below), whose sum is σ = 104381472. Its totient is φ = 95682972.

The previous prime is 100032209. The next prime is 100032227. The reversal of 100032221 is 122230001.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122230001 = 461 ⋅265141.

It is a cyclic number.

It is not a de Polignac number, because 100032221 - 2¹⁴ = 100015837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100032227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2174591 + ... + 2174636.

It is an arithmetic number, because the mean of its divisors is an integer number (26095368).

Almost surely, 2^100032221 is an apocalyptic number.

It is an amenable number.

100032221 is a deficient number, since it is larger than the sum of its proper divisors (4349251).

100032221 is an equidigital number, since it uses as much as digits as its factorization.

100032221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4349250.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 100032221 is about 10001.6109202468. The cubic root of 100032221 is about 464.2087302192.

Adding to 100032221 its reverse (122230001), we get a palindrome (222262222).

The spelling of 100032221 in words is "one hundred million, thirty-two thousand, two hundred twenty-one".