21113132313 has 24 divisors (see below), whose sum is σ = 34837566528. Its totient is φ = 11136595392.

The previous prime is 21113132239. The next prime is 21113132323. The reversal of 21113132313 is 31323131112.

It is a happy number.

It is not a de Polignac number, because 21113132313 - 2¹⁰ = 21113131289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 21113132313.

It is not an unprimeable number, because it can be changed into a prime (21113132323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2970970 + ... + 2978067.

It is an arithmetic number, because the mean of its divisors is an integer number (1451565272).

Almost surely, 2^21113132313 is an apocalyptic number.

It is an amenable number.

21113132313 is a deficient number, since it is larger than the sum of its proper divisors (13724434215).

21113132313 is a wasteful number, since it uses less digits than its factorization.

21113132313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5949073 (or 5949060 counting only the distinct ones).

The product of its digits is 324, while the sum is 21.

Adding to 21113132313 its reverse (31323131112), we get a palindrome (52436263425).

The spelling of 21113132313 in words is "twenty-one billion, one hundred thirteen million, one hundred thirty-two thousand, three hundred thirteen".