21410271247 has 2 divisors, whose sum is σ = 21410271248. Its totient is φ = 21410271246.

The previous prime is 21410271221. The next prime is 21410271283. The reversal of 21410271247 is 74217201412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21410271247 - 2²³ = 21401882639 is a prime.

It is a super-2 number, since 2×21410271247² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21410271647) 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, 10705135623 + 10705135624.

It is an arithmetic number, because the mean of its divisors is an integer number (10705135624).

Almost surely, 2^21410271247 is an apocalyptic number.

21410271247 is a deficient number, since it is larger than the sum of its proper divisors (1).

21410271247 is an equidigital number, since it uses as much as digits as its factorization.

21410271247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6272, while the sum is 31.

Adding to 21410271247 its reverse (74217201412), we get a palindrome (95627472659).

The spelling of 21410271247 in words is "twenty-one billion, four hundred ten million, two hundred seventy-one thousand, two hundred forty-seven".