21103330201 has 2 divisors, whose sum is σ = 21103330202. Its totient is φ = 21103330200.

The previous prime is 21103330187. The next prime is 21103330219. The reversal of 21103330201 is 10203330112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12215554576 + 8887775625 = 110524^2 + 94275^2 .

It is a cyclic number.

It is not a de Polignac number, because 21103330201 - 2²⁹ = 20566459289 is a prime.

It is not a weakly prime, because it can be changed into another prime (21103330271) 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 as a sum of consecutive naturals, namely, 10551665100 + 10551665101.

It is an arithmetic number, because the mean of its divisors is an integer number (10551665101).

Almost surely, 2^21103330201 is an apocalyptic number.

It is an amenable number.

21103330201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21103330201 is an equidigital number, since it uses as much as digits as its factorization.

21103330201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21103330201 its reverse (10203330112), we get a palindrome (31306660313).

The spelling of 21103330201 in words is "twenty-one billion, one hundred three million, three hundred thirty thousand, two hundred one".