21375065413277 has 4 divisors (see below), whose sum is σ = 21571166930940. Its totient is φ = 21178963895616.

The previous prime is 21375065413237. The next prime is 21375065413313. The reversal of 21375065413277 is 77231456057312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17916138700516 + 3458926712761 = 4232746^2 + 1859819^2 .

It is a cyclic number.

It is not a de Polignac number, because 21375065413277 - 2⁸ = 21375065413021 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 (21375065413237) 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 3 ways as a sum of consecutive naturals, for example, 98050758668 + ... + 98050758885.

It is an arithmetic number, because the mean of its divisors is an integer number (5392791732735).

Almost surely, 2^{21375065413277} is an apocalyptic number.

It is an amenable number.

21375065413277 is a deficient number, since it is larger than the sum of its proper divisors (196101517663).

21375065413277 is a wasteful number, since it uses less digits than its factorization.

21375065413277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196101517662.

The product of its (nonzero) digits is 7408800, while the sum is 53.

The spelling of 21375065413277 in words is "twenty-one trillion, three hundred seventy-five billion, sixty-five million, four hundred thirteen thousand, two hundred seventy-seven".