21110231313 has 32 divisors (see below), whose sum is σ = 31399505280. Its totient is φ = 14017328640.

The previous prime is 21110231309. The next prime is 21110231327. The reversal of 21110231313 is 31313201112.

It is not a de Polignac number, because 21110231313 - 2² = 21110231309 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21110231353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8372493 + ... + 8375013.

It is an arithmetic number, because the mean of its divisors is an integer number (981234540).

Almost surely, 2^21110231313 is an apocalyptic number.

It is an amenable number.

21110231313 is a deficient number, since it is larger than the sum of its proper divisors (10289273967).

21110231313 is a wasteful number, since it uses less digits than its factorization.

21110231313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3646 (or 3640 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21110231313 its reverse (31313201112), we get a palindrome (52423432425).

The spelling of 21110231313 in words is "twenty-one billion, one hundred ten million, two hundred thirty-one thousand, three hundred thirteen".