2302130021 has 8 divisors (see below), whose sum is σ = 2438178264. Its totient is φ = 2166151680.

The previous prime is 2302130009. The next prime is 2302130069. The reversal of 2302130021 is 1200312032.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 105801796 + 2196328225 = 10286^2 + 46865^2 .

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 2302130021 - 2⁶ = 2302129957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2302129978 and 2302130005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2302130321) 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, 60251 + ... + 90743.

It is an arithmetic number, because the mean of its divisors is an integer number (304772283).

Almost surely, 2^2302130021 is an apocalyptic number.

It is an amenable number.

2302130021 is a deficient number, since it is larger than the sum of its proper divisors (136048243).

2302130021 is a wasteful number, since it uses less digits than its factorization.

2302130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34951.

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

The square root of 2302130021 is about 47980.5170980889. The cubic root of 2302130021 is about 1320.4134802388.

Adding to 2302130021 its reverse (1200312032), we get a palindrome (3502442053).

The spelling of 2302130021 in words is "two billion, three hundred two million, one hundred thirty thousand, twenty-one".