12213121686 has 16 divisors (see below), whose sum is σ = 24437699184. Its totient is φ = 4069131264.

The previous prime is 12213121643. The next prime is 12213121721. The reversal of 12213121686 is 68612131221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 463435 + ... + 489078.

It is an arithmetic number, because the mean of its divisors is an integer number (1527356199).

Almost surely, 2^12213121686 is an apocalyptic number.

12213121686 is an abundant number, since it is smaller than the sum of its proper divisors (12224577498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12213121686 is a wasteful number, since it uses less digits than its factorization.

12213121686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954655.

The product of its digits is 6912, while the sum is 33.

The spelling of 12213121686 in words is "twelve billion, two hundred thirteen million, one hundred twenty-one thousand, six hundred eighty-six".