12122211986 has 8 divisors (see below), whose sum is σ = 18350137740. Its totient is φ = 6005499408.

The previous prime is 12122211977. The next prime is 12122211989. The reversal of 12122211986 is 68911222121.

It can be written as a sum of positive squares in 2 ways, for example, as 11624074225 + 498137761 = 107815^2 + 22319^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12122211989) 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, 27803021 + ... + 27803456.

Almost surely, 2^12122211986 is an apocalyptic number.

12122211986 is a deficient number, since it is larger than the sum of its proper divisors (6227925754).

12122211986 is a wasteful number, since it uses less digits than its factorization.

12122211986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55606588.

The product of its digits is 6912, while the sum is 35.

The spelling of 12122211986 in words is "twelve billion, one hundred twenty-two million, two hundred eleven thousand, nine hundred eighty-six".