21275375213603 has 4 divisors (see below), whose sum is σ = 24314714529840. Its totient is φ = 18236035897368.

The previous prime is 21275375213597. The next prime is 21275375213611. The reversal of 21275375213603 is 30631257357212.

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

It is a cyclic number.

It is not a de Polignac number, because 21275375213603 - 2²⁰ = 21275374165027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21275375216603) 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, 1519669658108 + ... + 1519669658121.

It is an arithmetic number, because the mean of its divisors is an integer number (6078678632460).

Almost surely, 2^{21275375213603} is an apocalyptic number.

21275375213603 is a deficient number, since it is larger than the sum of its proper divisors (3039339316237).

21275375213603 is an equidigital number, since it uses as much as digits as its factorization.

21275375213603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3039339316236.

The product of its (nonzero) digits is 1587600, while the sum is 47.

The spelling of 21275375213603 in words is "twenty-one trillion, two hundred seventy-five billion, three hundred seventy-five million, two hundred thirteen thousand, six hundred three".