21130020301 has 4 divisors (see below), whose sum is σ = 22755406492. Its totient is φ = 19504634112.

The previous prime is 21130020293. The next prime is 21130020313. The reversal of 21130020301 is 10302003112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10989328900 + 10140691401 = 104830^2 + 100701^2 .

It is a cyclic number.

It is not a de Polignac number, because 21130020301 - 2³ = 21130020293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 1625386177 = 21130020301 / (2 + 1 + 1 + 3 + 0 + 0 + 2 + 0 + 3 + 0 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130020361) 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, 812693076 + ... + 812693101.

It is an arithmetic number, because the mean of its divisors is an integer number (5688851623).

Almost surely, 2^21130020301 is an apocalyptic number.

It is an amenable number.

21130020301 is a deficient number, since it is larger than the sum of its proper divisors (1625386191).

21130020301 is a wasteful number, since it uses less digits than its factorization.

21130020301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625386190.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21130020301 its reverse (10302003112), we get a palindrome (31432023413).

The spelling of 21130020301 in words is "twenty-one billion, one hundred thirty million, twenty thousand, three hundred one".