221311311044 has 12 divisors (see below), whose sum is σ = 387343756800. Its totient is φ = 110641666248.

The previous prime is 221311311017. The next prime is 221311311071. The reversal of 221311311044 is 440113113122.

221311311044 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (221311311017) and next prime (221311311071).

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 in 3 ways as a sum of consecutive naturals, for example, 3461684 + ... + 3525035.

It is an arithmetic number, because the mean of its divisors is an integer number (32278646400).

Almost surely, 2^221311311044 is an apocalyptic number.

It is an amenable number.

221311311044 is a deficient number, since it is larger than the sum of its proper divisors (166032445756).

221311311044 is a wasteful number, since it uses less digits than its factorization.

221311311044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6994642 (or 6994640 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 221311311044 its reverse (440113113122), we get a palindrome (661424424166).

The spelling of 221311311044 in words is "two hundred twenty-one billion, three hundred eleven million, three hundred eleven thousand, forty-four".