302130221 has 4 divisors (see below), whose sum is σ = 303939552. Its totient is φ = 300320892.

The previous prime is 302130217. The next prime is 302130223. The reversal of 302130221 is 122031203.

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: 122031203 = 7 ⋅17433029.

It is a cyclic number.

It is not a de Polignac number, because 302130221 - 2² = 302130217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 302130196 and 302130205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (302130223) 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, 904415 + ... + 904748.

It is an arithmetic number, because the mean of its divisors is an integer number (75984888).

Almost surely, 2^302130221 is an apocalyptic number.

It is an amenable number.

302130221 is a deficient number, since it is larger than the sum of its proper divisors (1809331).

302130221 is a wasteful number, since it uses less digits than its factorization.

302130221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809330.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 302130221 is about 17381.8934814364. The cubic root of 302130221 is about 671.0137034921.

Adding to 302130221 its reverse (122031203), we get a palindrome (424161424).

The spelling of 302130221 in words is "three hundred two million, one hundred thirty thousand, two hundred twenty-one".