21241301369 has 2 divisors, whose sum is σ = 21241301370. Its totient is φ = 21241301368.

The previous prime is 21241301359. The next prime is 21241301453. The reversal of 21241301369 is 96310314212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16592788969 + 4648512400 = 128813^2 + 68180^2 .

It is a cyclic number.

It is not a de Polignac number, because 21241301369 - 2⁴ = 21241301353 is a prime.

It is a super-2 number, since 2×21241301369² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (21241301359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10620650684 + 10620650685.

It is an arithmetic number, because the mean of its divisors is an integer number (10620650685).

Almost surely, 2^21241301369 is an apocalyptic number.

It is an amenable number.

21241301369 is a deficient number, since it is larger than the sum of its proper divisors (1).

21241301369 is an equidigital number, since it uses as much as digits as its factorization.

21241301369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The spelling of 21241301369 in words is "twenty-one billion, two hundred forty-one million, three hundred one thousand, three hundred sixty-nine".