21220000201 has 2 divisors, whose sum is σ = 21220000202. Its totient is φ = 21220000200.

The previous prime is 21220000177. The next prime is 21220000259. The reversal of 21220000201 is 10200002212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21116449225 + 103550976 = 145315^2 + 10176^2 .

It is a cyclic number.

It is not a de Polignac number, because 21220000201 - 2¹⁷ = 21219869129 is a prime.

It is not a weakly prime, because it can be changed into another prime (21220000001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610000100 + 10610000101.

It is an arithmetic number, because the mean of its divisors is an integer number (10610000101).

Almost surely, 2^21220000201 is an apocalyptic number.

It is an amenable number.

21220000201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220000201 is an equidigital number, since it uses as much as digits as its factorization.

21220000201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21220000201 its reverse (10200002212), we get a palindrome (31420002413).

The spelling of 21220000201 in words is "twenty-one billion, two hundred twenty million, two hundred one", and thus it is an aban number.