221211444404 has 12 divisors (see below), whose sum is σ = 387123950304. Its totient is φ = 110604601464.

The previous prime is 221211444379. The next prime is 221211444427. The reversal of 221211444404 is 404444112122.

It is a congruent number.

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, 295217 + ... + 727719.

It is an arithmetic number, because the mean of its divisors is an integer number (32260329192).

Almost surely, 2^221211444404 is an apocalyptic number.

It is an amenable number.

221211444404 is a deficient number, since it is larger than the sum of its proper divisors (165912505900).

221211444404 is a wasteful number, since it uses less digits than its factorization.

221211444404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560374 (or 560372 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 29.

Adding to 221211444404 its reverse (404444112122), we get a palindrome (625655556526).

The spelling of 221211444404 in words is "two hundred twenty-one billion, two hundred eleven million, four hundred forty-four thousand, four hundred four".