21271707055 has 8 divisors (see below), whose sum is σ = 25907034672. Its totient is φ = 16763374848.

The previous prime is 21271707047. The next prime is 21271707059. The reversal of 21271707055 is 55070717212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21271707055 - 2³ = 21271707047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21271707059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31748482 + ... + 31749151.

It is an arithmetic number, because the mean of its divisors is an integer number (3238379334).

Almost surely, 2^21271707055 is an apocalyptic number.

21271707055 is a deficient number, since it is larger than the sum of its proper divisors (4635327617).

21271707055 is an equidigital number, since it uses as much as digits as its factorization.

21271707055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63497705.

The product of its (nonzero) digits is 34300, while the sum is 37.

The spelling of 21271707055 in words is "twenty-one billion, two hundred seventy-one million, seven hundred seven thousand, fifty-five".