21262410271 has 2 divisors, whose sum is σ = 21262410272. Its totient is φ = 21262410270.

The previous prime is 21262410179. The next prime is 21262410277. The reversal of 21262410271 is 17201426212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21262410271 - 2¹³ = 21262402079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21262410277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10631205135 + 10631205136.

It is an arithmetic number, because the mean of its divisors is an integer number (10631205136).

Almost surely, 2^21262410271 is an apocalyptic number.

21262410271 is a deficient number, since it is larger than the sum of its proper divisors (1).

21262410271 is an equidigital number, since it uses as much as digits as its factorization.

21262410271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

Adding to 21262410271 its reverse (17201426212), we get a palindrome (38463836483).

The spelling of 21262410271 in words is "twenty-one billion, two hundred sixty-two million, four hundred ten thousand, two hundred seventy-one".