100303220221 has 4 divisors (see below), whose sum is σ = 101190859452. Its totient is φ = 99415580992.

The previous prime is 100303220197. The next prime is 100303220233. The reversal of 100303220221 is 122022303001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122022303001 = 67 ⋅1821228403.

It can be written as a sum of positive squares in 2 ways, for example, as 5977454596 + 94325765625 = 77314^2 + 307125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100303220221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100303220195 and 100303220204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100303223221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443819446 + ... + 443819671.

It is an arithmetic number, because the mean of its divisors is an integer number (25297714863).

Almost surely, 2^100303220221 is an apocalyptic number.

It is an amenable number.

100303220221 is a deficient number, since it is larger than the sum of its proper divisors (887639231).

100303220221 is an equidigital number, since it uses as much as digits as its factorization.

100303220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887639230.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 100303220221 its reverse (122022303001), we get a palindrome (222325523222).

The spelling of 100303220221 in words is "one hundred billion, three hundred three million, two hundred twenty thousand, two hundred twenty-one".