21310011313 has 8 divisors (see below), whose sum is σ = 22287196800. Its totient is φ = 20337047808.

The previous prime is 21310011271. The next prime is 21310011329. The reversal of 21310011313 is 31311001312.

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-21310011313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21310012313) 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, 1045168 + ... + 1065361.

It is an arithmetic number, because the mean of its divisors is an integer number (2785899600).

Almost surely, 2^21310011313 is an apocalyptic number.

21310011313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21310011313 is a deficient number, since it is larger than the sum of its proper divisors (977185487).

21310011313 is a wasteful number, since it uses less digits than its factorization.

21310011313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110991.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 21310011313 its reverse (31311001312), we get a palindrome (52621012625).

The spelling of 21310011313 in words is "twenty-one billion, three hundred ten million, eleven thousand, three hundred thirteen".