301220221 has 4 divisors (see below), whose sum is σ = 303519744. Its totient is φ = 298920700.

The previous prime is 301220209. The next prime is 301220237. The reversal of 301220221 is 122022103.

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 a cyclic number.

It is not a de Polignac number, because 301220221 - 2⁵ = 301220189 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 (301220291) 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, 1149565 + ... + 1149826.

It is an arithmetic number, because the mean of its divisors is an integer number (75879936).

Almost surely, 2^301220221 is an apocalyptic number.

It is an amenable number.

301220221 is a deficient number, since it is larger than the sum of its proper divisors (2299523).

301220221 is a wasteful number, since it uses less digits than its factorization.

301220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2299522.

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

The square root of 301220221 is about 17355.6970761765. The cubic root of 301220221 is about 670.3393402434.

Adding to 301220221 its reverse (122022103), we get a palindrome (423242324).

The spelling of 301220221 in words is "three hundred one million, two hundred twenty thousand, two hundred twenty-one".