12684848621 has 4 divisors (see below), whose sum is σ = 12827375100. Its totient is φ = 12542322144.

The previous prime is 12684848593. The next prime is 12684848653.

12684848621 is nontrivially palindromic in base 10.

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 2201955625 + 10482892996 = 46925^2 + 102386^2 .

It is a cyclic number.

It is not a de Polignac number, because 12684848621 - 2¹⁰ = 12684847597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12684848621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12684848681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71263106 + ... + 71263283.

It is an arithmetic number, because the mean of its divisors is an integer number (3206843775).

Almost surely, 2^12684848621 is an apocalyptic number.

It is an amenable number.

12684848621 is a deficient number, since it is larger than the sum of its proper divisors (142526479).

12684848621 is an equidigital number, since it uses as much as digits as its factorization.

12684848621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142526478.

The product of its digits is 1179648, while the sum is 50.

The spelling of 12684848621 in words is "twelve billion, six hundred eighty-four million, eight hundred forty-eight thousand, six hundred twenty-one".