221244189602 has 18 divisors (see below), whose sum is σ = 342948947409. Its totient is φ = 107043662160.

The previous prime is 221244189577. The next prime is 221244189611. The reversal of 221244189602 is 206981442122.

221244189602 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 206843949601 + 14400240001 = 454801^2 + 120001^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332599.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221244189602.

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 8 ways as a sum of consecutive naturals, for example, 20615774 + ... + 20626502.

Almost surely, 2^221244189602 is an apocalyptic number.

221244189602 is a deficient number, since it is larger than the sum of its proper divisors (121704757807).

221244189602 is an frugal number, since it uses more digits than its factorization.

221244189602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21522 (or 10762 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 221244189602 in words is "two hundred twenty-one billion, two hundred forty-four million, one hundred eighty-nine thousand, six hundred two".