21202000001 has 32 divisors (see below), whose sum is σ = 27808800768. Its totient is φ = 15704377920.

The previous prime is 21201999977. The next prime is 21202000009. The reversal of 21202000001 is 10000020212.

It is not a de Polignac number, because 21202000001 - 2¹⁴ = 21201983617 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21202000009) 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 31 ways as a sum of consecutive naturals, for example, 9395 + ... + 206136.

It is an arithmetic number, because the mean of its divisors is an integer number (869025024).

Almost surely, 2^21202000001 is an apocalyptic number.

It is an amenable number.

21202000001 is a deficient number, since it is larger than the sum of its proper divisors (6606800767).

21202000001 is a wasteful number, since it uses less digits than its factorization.

21202000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215621.

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 21202000001 its reverse (10000020212), we get a palindrome (31202020213).

The spelling of 21202000001 in words is "twenty-one billion, two hundred two million, one", and thus it is an aban number.