2121314515 has 4 divisors (see below), whose sum is σ = 2545577424. Its totient is φ = 1697051608.

The previous prime is 2121314491. The next prime is 2121314543. The reversal of 2121314515 is 5154131212.

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

It is a cyclic number.

It is not a de Polignac number, because 2121314515 - 2⁷ = 2121314387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121314515.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 212131447 + ... + 212131456.

It is an arithmetic number, because the mean of its divisors is an integer number (636394356).

Almost surely, 2^2121314515 is an apocalyptic number.

2121314515 is a deficient number, since it is larger than the sum of its proper divisors (424262909).

2121314515 is an equidigital number, since it uses as much as digits as its factorization.

2121314515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424262908.

The product of its digits is 1200, while the sum is 25.

The square root of 2121314515 is about 46057.7302415132. The cubic root of 2121314515 is about 1284.8971166247.

Adding to 2121314515 its reverse (5154131212), we get a palindrome (7275445727).

The spelling of 2121314515 in words is "two billion, one hundred twenty-one million, three hundred fourteen thousand, five hundred fifteen".