2130321321 has 6 divisors (see below), whose sum is σ = 3077130810. Its totient is φ = 1420214208.

The previous prime is 2130321283. The next prime is 2130321329. The reversal of 2130321321 is 1231230312.

2130321321 is a `hidden beast` number, since 21 + 3 + 0 + 321 + 321 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2076078096 + 54243225 = 45564^2 + 7365^2 .

It is not a de Polignac number, because 2130321321 - 2⁶ = 2130321257 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2130321294 and 2130321303.

It is not an unprimeable number, because it can be changed into a prime (2130321329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 118351176 + ... + 118351193.

It is an arithmetic number, because the mean of its divisors is an integer number (512855135).

Almost surely, 2^2130321321 is an apocalyptic number.

It is an amenable number.

2130321321 is a deficient number, since it is larger than the sum of its proper divisors (946809489).

2130321321 is a wasteful number, since it uses less digits than its factorization.

2130321321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236702375 (or 236702372 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2130321321 is about 46155.4040281309. The cubic root of 2130321321 is about 1286.7130470528.

Adding to 2130321321 its reverse (1231230312), we get a palindrome (3361551633).

It can be divided in two parts, 21303 and 21321, that added together give a palindrome (42624).

The spelling of 2130321321 in words is "two billion, one hundred thirty million, three hundred twenty-one thousand, three hundred twenty-one".