221246206180 has 12 divisors (see below), whose sum is σ = 464617033020. Its totient is φ = 88498482464.

The previous prime is 221246206169. The next prime is 221246206201. The reversal of 221246206180 is 81602642122.

It can be written as a sum of positive squares in 2 ways, for example, as 135687616164 + 85558590016 = 368358^2 + 292504^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5531155135 + ... + 5531155174.

It is an arithmetic number, because the mean of its divisors is an integer number (38718086085).

Almost surely, 2^221246206180 is an apocalyptic number.

221246206180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221246206180 is an abundant number, since it is smaller than the sum of its proper divisors (243370826840).

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

221246206180 is a wasteful number, since it uses less digits than its factorization.

221246206180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11062310318 (or 11062310316 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The spelling of 221246206180 in words is "two hundred twenty-one billion, two hundred forty-six million, two hundred six thousand, one hundred eighty".