2130310321 has 4 divisors (see below), whose sum is σ = 2133315700. Its totient is φ = 2127304944.

The previous prime is 2130310291. The next prime is 2130310339. The reversal of 2130310321 is 1230130312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 754271296 + 1376039025 = 27464^2 + 37095^2 .

It is a cyclic number.

It is not a de Polignac number, because 2130310321 - 2⁹ = 2130309809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2130310295 and 2130310304.

It is not an unprimeable number, because it can be changed into a prime (2130310621) 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, 1501626 + ... + 1503043.

It is an arithmetic number, because the mean of its divisors is an integer number (533328925).

Almost surely, 2^2130310321 is an apocalyptic number.

It is an amenable number.

2130310321 is a deficient number, since it is larger than the sum of its proper divisors (3005379).

2130310321 is an equidigital number, since it uses as much as digits as its factorization.

2130310321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3005378.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 2130310321 is about 46155.2848653326. The cubic root of 2130310321 is about 1286.7108323841.

Adding to 2130310321 its reverse (1230130312), we get a palindrome (3360440633).

Subtracting from 2130310321 its reverse (1230130312), we obtain a square (900180009 = 30003²).

The spelling of 2130310321 in words is "two billion, one hundred thirty million, three hundred ten thousand, three hundred twenty-one".