302130021 has 8 divisors (see below), whose sum is σ = 406405440. Its totient is φ = 199637312.

The previous prime is 302130019. The next prime is 302130067. The reversal of 302130021 is 120031203.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 302130021 - 2¹ = 302130019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 302129979 and 302130006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (302130821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445281 + ... + 445958.

It is an arithmetic number, because the mean of its divisors is an integer number (50800680).

Almost surely, 2^302130021 is an apocalyptic number.

It is an amenable number.

302130021 is a deficient number, since it is larger than the sum of its proper divisors (104275419).

302130021 is a wasteful number, since it uses less digits than its factorization.

302130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891355.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 302130021 is about 17381.8877283223. The cubic root of 302130021 is about 671.0135554293.

Adding to 302130021 its reverse (120031203), we get a palindrome (422161224).

The spelling of 302130021 in words is "three hundred two million, one hundred thirty thousand, twenty-one".