21010200313 has 4 divisors (see below), whose sum is σ = 21011291380. Its totient is φ = 21009109248.

The previous prime is 21010200283. The next prime is 21010200317. The reversal of 21010200313 is 31300201012.

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 18108546624 + 2901653689 = 134568^2 + 53867^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21010200313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010200293 and 21010200302.

It is not an unprimeable number, because it can be changed into a prime (21010200317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 516120 + ... + 555337.

It is an arithmetic number, because the mean of its divisors is an integer number (5252822845).

Almost surely, 2^21010200313 is an apocalyptic number.

It is an amenable number.

21010200313 is a deficient number, since it is larger than the sum of its proper divisors (1091067).

21010200313 is a wasteful number, since it uses less digits than its factorization.

21010200313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091066.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21010200313 its reverse (31300201012), we get a palindrome (52310401325).

The spelling of 21010200313 in words is "twenty-one billion, ten million, two hundred thousand, three hundred thirteen".