21021322201 has 8 divisors (see below), whose sum is σ = 24139317600. Its totient is φ = 18104487840.

The previous prime is 21021322199. The next prime is 21021322207. The reversal of 21021322201 is 10222312012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21021322201 - 2¹ = 21021322199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21021322207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50290036 + ... + 50290453.

It is an arithmetic number, because the mean of its divisors is an integer number (3017414700).

Almost surely, 2^21021322201 is an apocalyptic number.

It is an amenable number.

21021322201 is a deficient number, since it is larger than the sum of its proper divisors (3117995399).

21021322201 is a wasteful number, since it uses less digits than its factorization.

21021322201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100580519.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21021322201 its reverse (10222312012), we get a palindrome (31243634213).

The spelling of 21021322201 in words is "twenty-one billion, twenty-one million, three hundred twenty-two thousand, two hundred one".