12636350221 has 8 divisors (see below), whose sum is σ = 13885732224. Its totient is φ = 11403738720.

The previous prime is 12636350219. The next prime is 12636350227. The reversal of 12636350221 is 12205363621.

It is a happy number.

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

It is not a de Polignac number, because 12636350221 - 2¹ = 12636350219 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 (12636350227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4191045 + ... + 4194058.

It is an arithmetic number, because the mean of its divisors is an integer number (1735716528).

Almost surely, 2^12636350221 is an apocalyptic number.

12636350221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12636350221 is a deficient number, since it is larger than the sum of its proper divisors (1249382003).

12636350221 is a wasteful number, since it uses less digits than its factorization.

12636350221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8385251.

The product of its (nonzero) digits is 12960, while the sum is 31.

The spelling of 12636350221 in words is "twelve billion, six hundred thirty-six million, three hundred fifty thousand, two hundred twenty-one".