21301130005 has 8 divisors (see below), whose sum is σ = 25562254392. Its totient is φ = 17040305088.

The previous prime is 21301129907. The next prime is 21301130009. The reversal of 21301130005 is 50003110312.

It can be written as a sum of positive squares in 4 ways, for example, as 125641681 + 21175488324 = 11209^2 + 145518^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21301130005 is a prime.

It is a super-2 number, since 2×21301130005² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301130009) 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 7 ways as a sum of consecutive naturals, for example, 135219 + ... + 246751.

It is an arithmetic number, because the mean of its divisors is an integer number (3195281799).

Almost surely, 2^21301130005 is an apocalyptic number.

It is an amenable number.

21301130005 is a deficient number, since it is larger than the sum of its proper divisors (4261124387).

21301130005 is a wasteful number, since it uses less digits than its factorization.

21301130005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149735.

The product of its (nonzero) digits is 90, while the sum is 16.

Adding to 21301130005 its reverse (50003110312), we get a palindrome (71304240317).

The spelling of 21301130005 in words is "twenty-one billion, three hundred one million, one hundred thirty thousand, five".