302130211021 has 4 divisors (see below), whose sum is σ = 302579142172. Its totient is φ = 301681279872.

The previous prime is 302130211003. The next prime is 302130211039. The reversal of 302130211021 is 120112031203.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (302130211003) and next prime (302130211039).

It can be written as a sum of positive squares in 2 ways, for example, as 202397412996 + 99732798025 = 449886^2 + 315805^2 .

It is a cyclic number.

It is not a de Polignac number, because 302130211021 - 2²¹ = 302128113869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 302130210986 and 302130211004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (302130211921) 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, 224464566 + ... + 224465911.

It is an arithmetic number, because the mean of its divisors is an integer number (75644785543).

Almost surely, 2^302130211021 is an apocalyptic number.

It is an amenable number.

302130211021 is a deficient number, since it is larger than the sum of its proper divisors (448931151).

302130211021 is an equidigital number, since it uses as much as digits as its factorization.

302130211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448931150.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 302130211021 its reverse (120112031203), we get a palindrome (422242242224).

The spelling of 302130211021 in words is "three hundred two billion, one hundred thirty million, two hundred eleven thousand, twenty-one".