221444666522 has 4 divisors (see below), whose sum is σ = 332166999786. Its totient is φ = 110722333260.

The previous prime is 221444666491. The next prime is 221444666591. The reversal of 221444666522 is 225666444122.

221444666522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 217117789681 + 4326876841 = 465959^2 + 65779^2 .

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 as a sum of consecutive naturals, namely, 55361166629 + ... + 55361166632.

Almost surely, 2^221444666522 is an apocalyptic number.

221444666522 is a deficient number, since it is larger than the sum of its proper divisors (110722333264).

221444666522 is a wasteful number, since it uses less digits than its factorization.

221444666522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110722333263.

The product of its digits is 1105920, while the sum is 44.

The spelling of 221444666522 in words is "two hundred twenty-one billion, four hundred forty-four million, six hundred sixty-six thousand, five hundred twenty-two".