21300605041187 has 2 divisors, whose sum is σ = 21300605041188. Its totient is φ = 21300605041186.

The previous prime is 21300605041141. The next prime is 21300605041211. The reversal of 21300605041187 is 78114050600312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21300605041187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21300605041187.

It is not a weakly prime, because it can be changed into another prime (21300605041117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650302520593 + 10650302520594.

It is an arithmetic number, because the mean of its divisors is an integer number (10650302520594).

Almost surely, 2^{21300605041187} is an apocalyptic number.

21300605041187 is a deficient number, since it is larger than the sum of its proper divisors (1).

21300605041187 is an equidigital number, since it uses as much as digits as its factorization.

21300605041187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

Adding to 21300605041187 its reverse (78114050600312), we get a palindrome (99414655641499).

The spelling of 21300605041187 in words is "twenty-one trillion, three hundred billion, six hundred five million, forty-one thousand, one hundred eighty-seven".