12206704621 has 4 divisors (see below), whose sum is σ = 12627625500. Its totient is φ = 11785783744.

The previous prime is 12206704613. The next prime is 12206704637. The reversal of 12206704621 is 12640760221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12640760221 = 67 ⋅188668063.

It can be written as a sum of positive squares in 2 ways, for example, as 6702696900 + 5504007721 = 81870^2 + 74189^2 .

It is not a de Polignac number, because 12206704621 - 2³ = 12206704613 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 (12206704651) 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, 210460396 + ... + 210460453.

It is an arithmetic number, because the mean of its divisors is an integer number (3156906375).

Almost surely, 2^12206704621 is an apocalyptic number.

It is an amenable number.

12206704621 is a deficient number, since it is larger than the sum of its proper divisors (420920879).

12206704621 is an equidigital number, since it uses as much as digits as its factorization.

12206704621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420920878.

The product of its (nonzero) digits is 8064, while the sum is 31.

The spelling of 12206704621 in words is "twelve billion, two hundred six million, seven hundred four thousand, six hundred twenty-one".