221393219042 has 6 divisors (see below), whose sum is σ = 332090826699. Its totient is φ = 110696276810.

The previous prime is 221393219029. The next prime is 221393219083. The reversal of 221393219042 is 240912393122.

It can be written as a sum of positive squares in only one way, i.e., 110696609521 + 110696609521 = 332711^2 + 332711^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332711.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221393218987 and 221393219005.

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 2 ways as a sum of consecutive naturals, for example, 499067 + ... + 831777.

Almost surely, 2^221393219042 is an apocalyptic number.

221393219042 is a deficient number, since it is larger than the sum of its proper divisors (110697607657).

221393219042 is an frugal number, since it uses more digits than its factorization.

221393219042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665424 (or 332713 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The spelling of 221393219042 in words is "two hundred twenty-one billion, three hundred ninety-three million, two hundred nineteen thousand, forty-two".