21320130113 has 2 divisors, whose sum is σ = 21320130114. Its totient is φ = 21320130112.

The previous prime is 21320130107. The next prime is 21320130179. The reversal of 21320130113 is 31103102312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12266227009 + 9053903104 = 110753^2 + 95152^2 .

It is a cyclic number.

It is not a de Polignac number, because 21320130113 - 2²⁶ = 21253021249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21320130091 and 21320130100.

It is not a weakly prime, because it can be changed into another prime (21320133113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660065056 + 10660065057.

It is an arithmetic number, because the mean of its divisors is an integer number (10660065057).

Almost surely, 2^21320130113 is an apocalyptic number.

It is an amenable number.

21320130113 is a deficient number, since it is larger than the sum of its proper divisors (1).

21320130113 is an equidigital number, since it uses as much as digits as its factorization.

21320130113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21320130113 its reverse (31103102312), we get a palindrome (52423232425).

The spelling of 21320130113 in words is "twenty-one billion, three hundred twenty million, one hundred thirty thousand, one hundred thirteen".