21300210289 has 2 divisors, whose sum is σ = 21300210290. Its totient is φ = 21300210288.

The previous prime is 21300210187. The next prime is 21300210293. The reversal of 21300210289 is 98201200312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10876821264 + 10423389025 = 104292^2 + 102095^2 .

It is a cyclic number.

It is not a de Polignac number, because 21300210289 - 2³¹ = 19152726641 is a prime.

It is not a weakly prime, because it can be changed into another prime (21300210989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650105144 + 10650105145.

It is an arithmetic number, because the mean of its divisors is an integer number (10650105145).

Almost surely, 2^21300210289 is an apocalyptic number.

It is an amenable number.

21300210289 is a deficient number, since it is larger than the sum of its proper divisors (1).

21300210289 is an equidigital number, since it uses as much as digits as its factorization.

21300210289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 21300210289 in words is "twenty-one billion, three hundred million, two hundred ten thousand, two hundred eighty-nine".