21001300259 has 2 divisors, whose sum is σ = 21001300260. Its totient is φ = 21001300258.

The previous prime is 21001300193. The next prime is 21001300289. The reversal of 21001300259 is 95200310012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21001300259 is a prime.

It is a super-2 number, since 2×21001300259² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21001300289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500650129 + 10500650130.

It is an arithmetic number, because the mean of its divisors is an integer number (10500650130).

Almost surely, 2^21001300259 is an apocalyptic number.

21001300259 is a deficient number, since it is larger than the sum of its proper divisors (1).

21001300259 is an equidigital number, since it uses as much as digits as its factorization.

21001300259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The spelling of 21001300259 in words is "twenty-one billion, one million, three hundred thousand, two hundred fifty-nine".