21306625410001 has 4 divisors (see below), whose sum is σ = 21306749422500. Its totient is φ = 21306501397504.

The previous prime is 21306625409989. The next prime is 21306625410013. The reversal of 21306625410001 is 10001452660312.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (21306625409989) and next prime (21306625410013).

It can be written as a sum of positive squares in 2 ways, for example, as 15728521446400 + 5578103963601 = 3965920^2 + 2361801^2 .

It is a cyclic number.

It is not a de Polignac number, because 21306625410001 - 2⁷ = 21306625409873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21306625410901) 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, 61748176 + ... + 62092273.

It is an arithmetic number, because the mean of its divisors is an integer number (5326687355625).

Almost surely, 2^{21306625410001} is an apocalyptic number.

It is an amenable number.

21306625410001 is a deficient number, since it is larger than the sum of its proper divisors (124012499).

21306625410001 is a wasteful number, since it uses less digits than its factorization.

21306625410001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124012498.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 21306625410001 in words is "twenty-one trillion, three hundred six billion, six hundred twenty-five million, four hundred ten thousand, one".