21300345113 has 4 divisors (see below), whose sum is σ = 21360686388. Its totient is φ = 21240003840.

The previous prime is 21300345107. The next prime is 21300345119. The reversal of 21300345113 is 31154300312.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21300345107) and next prime (21300345119).

It can be written as a sum of positive squares in 2 ways, for example, as 13108647049 + 8191698064 = 114493^2 + 90508^2 .

It is a cyclic number.

It is not a de Polignac number, because 21300345113 - 2⁴ = 21300345097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21300345119) 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 in 3 ways as a sum of consecutive naturals, for example, 30170108 + ... + 30170813.

It is an arithmetic number, because the mean of its divisors is an integer number (5340171597).

Almost surely, 2^21300345113 is an apocalyptic number.

It is an amenable number.

21300345113 is a deficient number, since it is larger than the sum of its proper divisors (60341275).

21300345113 is an equidigital number, since it uses as much as digits as its factorization.

21300345113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60341274.

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 21300345113 its reverse (31154300312), we get a palindrome (52454645425).

The spelling of 21300345113 in words is "twenty-one billion, three hundred million, three hundred forty-five thousand, one hundred thirteen".