21301266525289 has 2 divisors, whose sum is σ = 21301266525290. Its totient is φ = 21301266525288.

The previous prime is 21301266525281. The next prime is 21301266525353. The reversal of 21301266525289 is 98252566210312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12403723259664 + 8897543265625 = 3521892^2 + 2982875^2 .

It is a cyclic number.

It is not a de Polignac number, because 21301266525289 - 2³ = 21301266525281 is a prime.

It is not a weakly prime, because it can be changed into another prime (21301266525281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650633262644 + 10650633262645.

It is an arithmetic number, because the mean of its divisors is an integer number (10650633262645).

Almost surely, 2^{21301266525289} is an apocalyptic number.

It is an amenable number.

21301266525289 is a deficient number, since it is larger than the sum of its proper divisors (1).

21301266525289 is an equidigital number, since it uses as much as digits as its factorization.

21301266525289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3110400, while the sum is 52.

The spelling of 21301266525289 in words is "twenty-one trillion, three hundred one billion, two hundred sixty-six million, five hundred twenty-five thousand, two hundred eighty-nine".