21312010313 has 8 divisors (see below), whose sum is σ = 23250719520. Its totient is φ = 19373510080.

The previous prime is 21312010297. The next prime is 21312010337. The reversal of 21312010313 is 31301021312.

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

It is a cyclic number.

It is not a de Polignac number, because 21312010313 - 2⁴ = 21312010297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21312010291 and 21312010300.

It is not an unprimeable number, because it can be changed into a prime (21312010813) 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, 224993 + ... + 305361.

It is an arithmetic number, because the mean of its divisors is an integer number (2906339940).

Almost surely, 2^21312010313 is an apocalyptic number.

It is an amenable number.

21312010313 is a deficient number, since it is larger than the sum of its proper divisors (1938709207).

21312010313 is a wasteful number, since it uses less digits than its factorization.

21312010313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104487.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21312010313 its reverse (31301021312), we get a palindrome (52613031625).

The spelling of 21312010313 in words is "twenty-one billion, three hundred twelve million, ten thousand, three hundred thirteen".