21201200000089 has 2 divisors, whose sum is σ = 21201200000090. Its totient is φ = 21201200000088.

The previous prime is 21201200000087. The next prime is 21201200000129. The reversal of 21201200000089 is 98000000210212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19142305036864 + 2058894963225 = 4375192^2 + 1434885^2 .

It is a cyclic number.

It is not a de Polignac number, because 21201200000089 - 2¹ = 21201200000087 is a prime.

Together with 21201200000087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21201200000087) 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 as a sum of consecutive naturals, namely, 10600600000044 + 10600600000045.

It is an arithmetic number, because the mean of its divisors is an integer number (10600600000045).

Almost surely, 2^{21201200000089} is an apocalyptic number.

It is an amenable number.

21201200000089 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201200000089 is an equidigital number, since it uses as much as digits as its factorization.

21201200000089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 21201200000089 in words is "twenty-one trillion, two hundred one billion, two hundred million, eighty-nine", and thus it is an aban number.