21200010313 has 4 divisors (see below), whose sum is σ = 21455432208. Its totient is φ = 20944588420.

The previous prime is 21200010253. The next prime is 21200010347. The reversal of 21200010313 is 31301000212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21200010313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21200010293 and 21200010302.

It is not an unprimeable number, because it can be changed into a prime (21200010383) 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, 127710823 + ... + 127710988.

It is an arithmetic number, because the mean of its divisors is an integer number (5363858052).

Almost surely, 2^21200010313 is an apocalyptic number.

It is an amenable number.

21200010313 is a deficient number, since it is larger than the sum of its proper divisors (255421895).

21200010313 is an equidigital number, since it uses as much as digits as its factorization.

21200010313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255421894.

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

Adding to 21200010313 its reverse (31301000212), we get a palindrome (52501010525).

The spelling of 21200010313 in words is "twenty-one billion, two hundred million, ten thousand, three hundred thirteen".