221827678663042 has 8 divisors (see below), whose sum is σ = 336171842922636. Its totient is φ = 109770397688832.

The previous prime is 221827678663039. The next prime is 221827678663049. The reversal of 221827678663042 is 240366876728122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 195145505363601 + 26682173299441 = 13969449^2 + 5165479^2 .

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

It is not an unprimeable number, because it can be changed into a prime (221827678663049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 571720821103 + ... + 571720821490.

Almost surely, 2^{221827678663042} is an apocalyptic number.

221827678663042 is a deficient number, since it is larger than the sum of its proper divisors (114344164259594).

221827678663042 is a wasteful number, since it uses less digits than its factorization.

221827678663042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143441642692.

The product of its (nonzero) digits is 130056192, while the sum is 64.

The spelling of 221827678663042 in words is "two hundred twenty-one trillion, eight hundred twenty-seven billion, six hundred seventy-eight million, six hundred sixty-three thousand, forty-two".