100302221 has 4 divisors (see below), whose sum is σ = 101034492. Its totient is φ = 99569952.

The previous prime is 100302211. The next prime is 100302259. The reversal of 100302221 is 122203001.

It is a happy number.

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 40780996 + 59521225 = 6386^2 + 7715^2 .

It is a cyclic number.

It is not a de Polignac number, because 100302221 - 2⁶ = 100302157 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 (100302211) 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, 365930 + ... + 366203.

It is an arithmetic number, because the mean of its divisors is an integer number (25258623).

Almost surely, 2^100302221 is an apocalyptic number.

It is an amenable number.

100302221 is a deficient number, since it is larger than the sum of its proper divisors (732271).

100302221 is an equidigital number, since it uses as much as digits as its factorization.

100302221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732270.

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

The square root of 100302221 is about 10015.0996500285. The cubic root of 100302221 is about 464.6260082999.

Adding to 100302221 its reverse (122203001), we get a palindrome (222505222).

The spelling of 100302221 in words is "one hundred million, three hundred two thousand, two hundred twenty-one".