221144433152242 has 8 divisors (see below), whose sum is σ = 343155154891500. Its totient is φ = 106759381521744.

The previous prime is 221144433152231. The next prime is 221144433152261. The reversal of 221144433152242 is 242251334441122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 193763922247921 + 27380510904321 = 13919911^2 + 5232639^2 .

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 = 221144433152195 and 221144433152204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1906417527117 + ... + 1906417527232.

Almost surely, 2^{221144433152242} is an apocalyptic number.

221144433152242 is a deficient number, since it is larger than the sum of its proper divisors (122010721739258).

221144433152242 is a wasteful number, since it uses less digits than its factorization.

221144433152242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3812835054380.

The product of its digits is 368640, while the sum is 40.

Adding to 221144433152242 its reverse (242251334441122), we get a palindrome (463395767593364).

The spelling of 221144433152242 in words is "two hundred twenty-one trillion, one hundred forty-four billion, four hundred thirty-three million, one hundred fifty-two thousand, two hundred forty-two".