2121130313 has 4 divisors (see below), whose sum is σ = 2125559040. Its totient is φ = 2116701588.

The previous prime is 2121130309. The next prime is 2121130343. The reversal of 2121130313 is 3130311212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2121130313 - 2² = 2121130309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121130291 and 2121130300.

It is not an unprimeable number, because it can be changed into a prime (2121130343) 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, 2213645 + ... + 2214602.

It is an arithmetic number, because the mean of its divisors is an integer number (531389760).

Almost surely, 2^2121130313 is an apocalyptic number.

It is an amenable number.

2121130313 is a deficient number, since it is larger than the sum of its proper divisors (4428727).

2121130313 is an equidigital number, since it uses as much as digits as its factorization.

2121130313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4428726.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 2121130313 is about 46055.7305120655. The cubic root of 2121130313 is about 1284.8599246748.

Adding to 2121130313 its reverse (3130311212), we get a palindrome (5251441525).

The spelling of 2121130313 in words is "two billion, one hundred twenty-one million, one hundred thirty thousand, three hundred thirteen".