21301302001 has 24 divisors (see below), whose sum is σ = 25115187240. Its totient is φ = 18012056832.

The previous prime is 21301301941. The next prime is 21301302017. The reversal of 21301302001 is 10020310312.

It can be written as a sum of positive squares in 4 ways, for example, as 36663025 + 21264638976 = 6055^2 + 145824^2 .

It is not a de Polignac number, because 21301302001 - 2¹¹ = 21301299953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21301302101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1235895 + ... + 1253011.

It is an arithmetic number, because the mean of its divisors is an integer number (1046466135).

Almost surely, 2^21301302001 is an apocalyptic number.

It is an amenable number.

21301302001 is a deficient number, since it is larger than the sum of its proper divisors (3813885239).

21301302001 is a wasteful number, since it uses less digits than its factorization.

21301302001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17473 (or 17466 counting only the distinct ones).

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

Adding to 21301302001 its reverse (10020310312), we get a palindrome (31321612313).

The spelling of 21301302001 in words is "twenty-one billion, three hundred one million, three hundred two thousand, one".