21103202313 has 12 divisors (see below), whose sum is σ = 30502758000. Its totient is φ = 14059407096.

The previous prime is 21103202293. The next prime is 21103202333. The reversal of 21103202313 is 31320230112.

21103202313 is a `hidden beast` number, since 2 + 110 + 320 + 231 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (21103202293) and next prime (21103202333).

It is not a de Polignac number, because 21103202313 - 2⁶ = 21103202249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21103202333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 768631 + ... + 795612.

It is an arithmetic number, because the mean of its divisors is an integer number (2541896500).

Almost surely, 2^21103202313 is an apocalyptic number.

It is an amenable number.

21103202313 is a deficient number, since it is larger than the sum of its proper divisors (9399555687).

21103202313 is a wasteful number, since it uses less digits than its factorization.

21103202313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565748 (or 1565745 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21103202313 its reverse (31320230112), we get a palindrome (52423432425).

The spelling of 21103202313 in words is "twenty-one billion, one hundred three million, two hundred two thousand, three hundred thirteen".