21300011461 has 2 divisors, whose sum is σ = 21300011462. Its totient is φ = 21300011460.

The previous prime is 21300011413. The next prime is 21300011479. The reversal of 21300011461 is 16411000312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14254927236 + 7045084225 = 119394^2 + 83935^2 .

It is a cyclic number.

It is not a de Polignac number, because 21300011461 - 2¹³ = 21300003269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21300011561) 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, 10650005730 + 10650005731.

It is an arithmetic number, because the mean of its divisors is an integer number (10650005731).

Almost surely, 2^21300011461 is an apocalyptic number.

It is an amenable number.

21300011461 is a deficient number, since it is larger than the sum of its proper divisors (1).

21300011461 is an equidigital number, since it uses as much as digits as its factorization.

21300011461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21300011461 its reverse (16411000312), we get a palindrome (37711011773).

The spelling of 21300011461 in words is "twenty-one billion, three hundred million, eleven thousand, four hundred sixty-one".