21203302201 has 4 divisors (see below), whose sum is σ = 21294303732. Its totient is φ = 21112300672.

The previous prime is 21203302171. The next prime is 21203302213. The reversal of 21203302201 is 10220330212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7165791801 + 14037510400 = 84651^2 + 118480^2 .

It is a cyclic number.

It is not a de Polignac number, because 21203302201 - 2¹⁹ = 21202777913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21203312201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45500416 + ... + 45500881.

It is an arithmetic number, because the mean of its divisors is an integer number (5323575933).

Almost surely, 2^21203302201 is an apocalyptic number.

It is an amenable number.

21203302201 is a deficient number, since it is larger than the sum of its proper divisors (91001531).

21203302201 is an equidigital number, since it uses as much as digits as its factorization.

21203302201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91001530.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21203302201 its reverse (10220330212), we get a palindrome (31423632413).

The spelling of 21203302201 in words is "twenty-one billion, two hundred three million, three hundred two thousand, two hundred one".