221944038188 has 12 divisors (see below), whose sum is σ = 388407854520. Its totient is φ = 110970365472.

The previous prime is 221944038187. The next prime is 221944038191. The reversal of 221944038188 is 881830449122.

221944038188 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221944038187) 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 3 ways as a sum of consecutive naturals, for example, 81878 + ... + 671261.

It is an arithmetic number, because the mean of its divisors is an integer number (32367321210).

Almost surely, 2^221944038188 is an apocalyptic number.

It is an amenable number.

221944038188 is a deficient number, since it is larger than the sum of its proper divisors (166463816332).

221944038188 is a wasteful number, since it uses less digits than its factorization.

221944038188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826816 (or 826814 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 50.

The spelling of 221944038188 in words is "two hundred twenty-one billion, nine hundred forty-four million, thirty-eight thousand, one hundred eighty-eight".