21202321001 has 8 divisors (see below), whose sum is σ = 22451335560. Its totient is φ = 19953508608.

The previous prime is 21202320991. The next prime is 21202321043. The reversal of 21202321001 is 10012320212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4805262400 + 16397058601 = 69320^2 + 128051^2 .

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-21202321001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202321061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201275 + ... + 287951.

It is an arithmetic number, because the mean of its divisors is an integer number (2806416945).

Almost surely, 2^21202321001 is an apocalyptic number.

It is an amenable number.

21202321001 is a deficient number, since it is larger than the sum of its proper divisors (1249014559).

21202321001 is a wasteful number, since it uses less digits than its factorization.

21202321001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101083.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21202321001 its reverse (10012320212), we get a palindrome (31214641213).

The spelling of 21202321001 in words is "twenty-one billion, two hundred two million, three hundred twenty-one thousand, one".