21130213113 has 6 divisors (see below), whose sum is σ = 30521418954. Its totient is φ = 14086808736.

The previous prime is 21130213079. The next prime is 21130213127. The reversal of 21130213113 is 31131203112.

It can be written as a sum of positive squares in only one way, i.e., 17221837824 + 3908375289 = 131232^2 + 62517^2 .

It is not a de Polignac number, because 21130213113 - 2⁹ = 21130212601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21130213163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1173900720 + ... + 1173900737.

It is an arithmetic number, because the mean of its divisors is an integer number (5086903159).

Almost surely, 2^21130213113 is an apocalyptic number.

It is an amenable number.

21130213113 is a deficient number, since it is larger than the sum of its proper divisors (9391205841).

21130213113 is a wasteful number, since it uses less digits than its factorization.

21130213113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2347801463 (or 2347801460 counting only the distinct ones).

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

Adding to 21130213113 its reverse (31131203112), we get a palindrome (52261416225).

The spelling of 21130213113 in words is "twenty-one billion, one hundred thirty million, two hundred thirteen thousand, one hundred thirteen".