21312300313 has 8 divisors (see below), whose sum is σ = 21894830496. Its totient is φ = 20733720000.

The previous prime is 21312300299. The next prime is 21312300341. The reversal of 21312300313 is 31300321312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21312300313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21312306313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 976528 + ... + 998113.

It is an arithmetic number, because the mean of its divisors is an integer number (2736853812).

Almost surely, 2^21312300313 is an apocalyptic number.

It is an amenable number.

21312300313 is a deficient number, since it is larger than the sum of its proper divisors (582530183).

21312300313 is a wasteful number, since it uses less digits than its factorization.

21312300313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1974935.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21312300313 its reverse (31300321312), we get a palindrome (52612621625).

The spelling of 21312300313 in words is "twenty-one billion, three hundred twelve million, three hundred thousand, three hundred thirteen".