12609896221 has 8 divisors (see below), whose sum is σ = 13639192280. Its totient is φ = 11589072192.

The previous prime is 12609896219. The next prime is 12609896227. The reversal of 12609896221 is 12269890621.

It can be written as a sum of positive squares in 4 ways, for example, as 770062500 + 11839833721 = 27750^2 + 108811^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12609896221 - 2¹ = 12609896219 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 (12609896227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2114910 + ... + 2120863.

It is an arithmetic number, because the mean of its divisors is an integer number (1704899035).

Almost surely, 2^12609896221 is an apocalyptic number.

It is an amenable number.

12609896221 is a deficient number, since it is larger than the sum of its proper divisors (1029296059).

12609896221 is a wasteful number, since it uses less digits than its factorization.

12609896221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4236015.

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 12609896221 in words is "twelve billion, six hundred nine million, eight hundred ninety-six thousand, two hundred twenty-one".