2130323021 has 8 divisors (see below), whose sum is σ = 2153308920. Its totient is φ = 2107358208.

The previous prime is 2130323017. The next prime is 2130323029. The reversal of 2130323021 is 1203230312.

It can be written as a sum of positive squares in 4 ways, for example, as 790396996 + 1339926025 = 28114^2 + 36605^2 .

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 2130323021 - 2² = 2130323017 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 (2130323029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279185 + ... + 286713.

It is an arithmetic number, because the mean of its divisors is an integer number (269163615).

Almost surely, 2^2130323021 is an apocalyptic number.

It is an amenable number.

2130323021 is a deficient number, since it is larger than the sum of its proper divisors (22985899).

2130323021 is an equidigital number, since it uses as much as digits as its factorization.

2130323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10543.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 2130323021 is about 46155.4224441723. The cubic root of 2130323021 is about 1286.7133893191.

Adding to 2130323021 its reverse (1203230312), we get a palindrome (3333553333).

The spelling of 2130323021 in words is "two billion, one hundred thirty million, three hundred twenty-three thousand, twenty-one".