21210302201 has 8 divisors (see below), whose sum is σ = 23143574208. Its totient is φ = 19277874000.

The previous prime is 21210302189. The next prime is 21210302251. The reversal of 21210302201 is 10220301212.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-21210302201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21210302251) 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 7 ways as a sum of consecutive naturals, for example, 157805 + ... + 259466.

It is an arithmetic number, because the mean of its divisors is an integer number (2892946776).

Almost surely, 2^21210302201 is an apocalyptic number.

It is an amenable number.

21210302201 is a deficient number, since it is larger than the sum of its proper divisors (1933272007).

21210302201 is a wasteful number, since it uses less digits than its factorization.

21210302201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421903.

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

Adding to 21210302201 its reverse (10220301212), we get a palindrome (31430603413).

The spelling of 21210302201 in words is "twenty-one billion, two hundred ten million, three hundred two thousand, two hundred one".