221020043244 has 96 divisors (see below), whose sum is σ = 692426466816. Its totient is φ = 52991815680.

The previous prime is 221020043243. The next prime is 221020043261. The reversal of 221020043244 is 442340020122.

It is not an unprimeable number, because it can be changed into a prime (221020043243) 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 31 ways as a sum of consecutive naturals, for example, 9187957 + ... + 9211980.

It is an arithmetic number, because the mean of its divisors is an integer number (7212775696).

Almost surely, 2^221020043244 is an apocalyptic number.

It is an amenable number.

221020043244 is an abundant number, since it is smaller than the sum of its proper divisors (471406423572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221020043244 is a wasteful number, since it uses less digits than its factorization.

221020043244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18399975 (or 18399973 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 221020043244 its reverse (442340020122), we get a palindrome (663360063366).

The spelling of 221020043244 in words is "two hundred twenty-one billion, twenty million, forty-three thousand, two hundred forty-four".