12221000180 has 12 divisors (see below), whose sum is σ = 25664100420. Its totient is φ = 4888400064.

The previous prime is 12221000179. The next prime is 12221000219. The reversal of 12221000180 is 8100012221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4439290384 + 7781709796 = 66628^2 + 88214^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 305524985 + ... + 305525024.

It is an arithmetic number, because the mean of its divisors is an integer number (2138675035).

Almost surely, 2^12221000180 is an apocalyptic number.

12221000180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221000180 is an abundant number, since it is smaller than the sum of its proper divisors (13443100240).

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

12221000180 is a wasteful number, since it uses less digits than its factorization.

12221000180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611050018 (or 611050016 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The spelling of 12221000180 in words is "twelve billion, two hundred twenty-one million, one hundred eighty", and thus it is an aban number.