2121302313 has 24 divisors (see below), whose sum is σ = 3493912968. Its totient is φ = 1228626432.

The previous prime is 2121302311. The next prime is 2121302327. The reversal of 2121302313 is 3132031212.

It can be written as a sum of positive squares in 4 ways, for example, as 468635904 + 1652666409 = 21648^2 + 40653^2 .

It is not a de Polignac number, because 2121302313 - 2¹ = 2121302311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121302311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 531270 + ... + 535247.

It is an arithmetic number, because the mean of its divisors is an integer number (145579707).

Almost surely, 2^2121302313 is an apocalyptic number.

It is an amenable number.

2121302313 is a deficient number, since it is larger than the sum of its proper divisors (1372610655).

2121302313 is a wasteful number, since it uses less digits than its factorization.

2121302313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066553 (or 1066550 counting only the distinct ones).

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

The square root of 2121302313 is about 46057.5977771312. The cubic root of 2121302313 is about 1284.8946530038.

Adding to 2121302313 its reverse (3132031212), we get a palindrome (5253333525).

The spelling of 2121302313 in words is "two billion, one hundred twenty-one million, three hundred two thousand, three hundred thirteen".