221244443242 has 8 divisors (see below), whose sum is σ = 335152473732. Its totient is φ = 109526952000.

The previous prime is 221244443219. The next prime is 221244443261. The reversal of 221244443242 is 242344442122.

It can be written as a sum of positive squares in 2 ways, for example, as 199817046081 + 21427397161 = 447009^2 + 146381^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 221244443198 and 221244443207.

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, 547634559 + ... + 547634962.

Almost surely, 2^221244443242 is an apocalyptic number.

221244443242 is a deficient number, since it is larger than the sum of its proper divisors (113908030490).

221244443242 is a wasteful number, since it uses less digits than its factorization.

221244443242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095269624.

The product of its digits is 98304, while the sum is 34.

Adding to 221244443242 its reverse (242344442122), we get a palindrome (463588885364).

The spelling of 221244443242 in words is "two hundred twenty-one billion, two hundred forty-four million, four hundred forty-three thousand, two hundred forty-two".