221244441020 has 96 divisors (see below), whose sum is σ = 478587916800. Its totient is φ = 85879904000.

The previous prime is 221244441007. The next prime is 221244441023. The reversal of 221244441020 is 20144442122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221244441023) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 42783035 + ... + 42788205.

It is an arithmetic number, because the mean of its divisors is an integer number (4985290800).

Almost surely, 2^221244441020 is an apocalyptic number.

221244441020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221244441020 is an abundant number, since it is smaller than the sum of its proper divisors (257343475780).

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

221244441020 is a wasteful number, since it uses less digits than its factorization.

221244441020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5699 (or 5697 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 221244441020 its reverse (20144442122), we get a palindrome (241388883142).

The spelling of 221244441020 in words is "two hundred twenty-one billion, two hundred forty-four million, four hundred forty-one thousand, twenty".