221020331024 has 10 divisors (see below), whose sum is σ = 428226891390. Its totient is φ = 110510165504.

The previous prime is 221020331017. The next prime is 221020331111. The reversal of 221020331024 is 420133020122.

221020331024 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 220930081024 + 90250000 = 470032^2 + 9500^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221020330987 and 221020331005.

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, 6906885329 + ... + 6906885360.

It is an arithmetic number, because the mean of its divisors is an integer number (42822689139).

Almost surely, 2^221020331024 is an apocalyptic number.

It is an amenable number.

221020331024 is a deficient number, since it is larger than the sum of its proper divisors (207206560366).

221020331024 is a wasteful number, since it uses less digits than its factorization.

221020331024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13813770697 (or 13813770691 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 221020331024 its reverse (420133020122), we get a palindrome (641153351146).

The spelling of 221020331024 in words is "two hundred twenty-one billion, twenty million, three hundred thirty-one thousand, twenty-four".