21298223610571 has 2 divisors, whose sum is σ = 21298223610572. Its totient is φ = 21298223610570.

The previous prime is 21298223610569. The next prime is 21298223610583. The reversal of 21298223610571 is 17501632289212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21298223610571 - 2¹ = 21298223610569 is a prime.

It is a super-2 number, since 2×21298223610571² (a number of 27 digits) contains 22 as substring.

Together with 21298223610569, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21298223610551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10649111805285 + 10649111805286.

It is an arithmetic number, because the mean of its divisors is an integer number (10649111805286).

Almost surely, 2^{21298223610571} is an apocalyptic number.

21298223610571 is a deficient number, since it is larger than the sum of its proper divisors (1).

21298223610571 is an equidigital number, since it uses as much as digits as its factorization.

21298223610571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 49.

Adding to 21298223610571 its reverse (17501632289212), we get a palindrome (38799855899783).

The spelling of 21298223610571 in words is "twenty-one trillion, two hundred ninety-eight billion, two hundred twenty-three million, six hundred ten thousand, five hundred seventy-one".