21441210289 has 2 divisors, whose sum is σ = 21441210290. Its totient is φ = 21441210288.

The previous prime is 21441210283. The next prime is 21441210293. The reversal of 21441210289 is 98201214412.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11715897600 + 9725312689 = 108240^2 + 98617^2 .

It is a cyclic number.

It is not a de Polignac number, because 21441210289 - 2³ = 21441210281 is a prime.

It is not a weakly prime, because it can be changed into another prime (21441210281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10720605144 + 10720605145.

It is an arithmetic number, because the mean of its divisors is an integer number (10720605145).

Almost surely, 2^21441210289 is an apocalyptic number.

It is an amenable number.

21441210289 is a deficient number, since it is larger than the sum of its proper divisors (1).

21441210289 is an equidigital number, since it uses as much as digits as its factorization.

21441210289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 34.

The spelling of 21441210289 in words is "twenty-one billion, four hundred forty-one million, two hundred ten thousand, two hundred eighty-nine".