2101021313 has 4 divisors (see below), whose sum is σ = 2224610820. Its totient is φ = 1977431808.

The previous prime is 2101021289. The next prime is 2101021331. The reversal of 2101021313 is 3131201012.

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 995591809 + 1105429504 = 31553^2 + 33248^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101021313 - 2²⁸ = 1832585857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2101021513) 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, 61794728 + ... + 61794761.

It is an arithmetic number, because the mean of its divisors is an integer number (556152705).

Almost surely, 2^2101021313 is an apocalyptic number.

It is an amenable number.

2101021313 is a deficient number, since it is larger than the sum of its proper divisors (123589507).

2101021313 is a wasteful number, since it uses less digits than its factorization.

2101021313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123589506.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 2101021313 is about 45836.8990334207. The cubic root of 2101021313 is about 1280.7867300959.

Adding to 2101021313 its reverse (3131201012), we get a palindrome (5232222325).

The spelling of 2101021313 in words is "two billion, one hundred one million, twenty-one thousand, three hundred thirteen".