2312130321 has 6 divisors (see below), whose sum is σ = 3339743810. Its totient is φ = 1541420208.

The previous prime is 2312130313. The next prime is 2312130329. The reversal of 2312130321 is 1230312132.

2312130321 is a `hidden beast` number, since 2 + 312 + 1 + 30 + 321 = 666.

It is an interprime number because it is at equal distance from previous prime (2312130313) and next prime (2312130329).

It can be written as a sum of positive squares in only one way, i.e., 2165599296 + 146531025 = 46536^2 + 12105^2 .

It is not a de Polignac number, because 2312130321 - 2³ = 2312130313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2312130294 and 2312130303.

It is not an unprimeable number, because it can be changed into a prime (2312130329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128451676 + ... + 128451693.

Almost surely, 2^2312130321 is an apocalyptic number.

It is an amenable number.

2312130321 is a deficient number, since it is larger than the sum of its proper divisors (1027613489).

2312130321 is a wasteful number, since it uses less digits than its factorization.

2312130321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256903375 (or 256903372 counting only the distinct ones).

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

The square root of 2312130321 is about 48084.6162613366. The cubic root of 2312130321 is about 1322.3226479728.

Adding to 2312130321 its reverse (1230312132), we get a palindrome (3542442453).

The spelling of 2312130321 in words is "two billion, three hundred twelve million, one hundred thirty thousand, three hundred twenty-one".