2121030313 has 4 divisors (see below), whose sum is σ = 2245796820. Its totient is φ = 1996263808.

The previous prime is 2121030283. The next prime is 2121030337. The reversal of 2121030313 is 3130301212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1192182784 + 928847529 = 34528^2 + 30477^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121030313 - 2²¹ = 2118933161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121030383) 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, 62383228 + ... + 62383261.

It is an arithmetic number, because the mean of its divisors is an integer number (561449205).

Almost surely, 2^2121030313 is an apocalyptic number.

It is an amenable number.

2121030313 is a deficient number, since it is larger than the sum of its proper divisors (124766507).

2121030313 is a wasteful number, since it uses less digits than its factorization.

2121030313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124766506.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 2121030313 is about 46054.6448580379. The cubic root of 2121030313 is about 1284.8397329228.

Adding to 2121030313 its reverse (3130301212), we get a palindrome (5251331525).

The spelling of 2121030313 in words is "two billion, one hundred twenty-one million, thirty thousand, three hundred thirteen".