2121304313 has 8 divisors (see below), whose sum is σ = 2200211400. Its totient is φ = 2043532800.

The previous prime is 2121304291. The next prime is 2121304321. The reversal of 2121304313 is 3134031212.

It can be written as a sum of positive squares in 4 ways, for example, as 654950464 + 1466353849 = 25592^2 + 38293^2 .

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 2121304313 - 2⁶ = 2121304249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2121304333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280088 + ... + 287561.

It is an arithmetic number, because the mean of its divisors is an integer number (275026425).

Almost surely, 2^2121304313 is an apocalyptic number.

It is an amenable number.

2121304313 is a deficient number, since it is larger than the sum of its proper divisors (78907087).

2121304313 is a wasteful number, since it uses less digits than its factorization.

2121304313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567787.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 2121304313 is about 46057.6194890704. The cubic root of 2121304313 is about 1284.8950568105.

Adding to 2121304313 its reverse (3134031212), we get a palindrome (5255335525).

The spelling of 2121304313 in words is "two billion, one hundred twenty-one million, three hundred four thousand, three hundred thirteen".