221022244244 has 6 divisors (see below), whose sum is σ = 386788927434. Its totient is φ = 110511122120.

The previous prime is 221022244241. The next prime is 221022244273. The reversal of 221022244244 is 442442220122.

It can be written as a sum of positive squares in only one way, i.e., 177022147600 + 44000096644 = 420740^2 + 209762^2 .

It is a super-2 number, since 2×221022244244² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022244241) 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 as a sum of consecutive naturals, namely, 27627780527 + ... + 27627780534.

It is an arithmetic number, because the mean of its divisors is an integer number (64464821239).

Almost surely, 2^221022244244 is an apocalyptic number.

It is an amenable number.

221022244244 is a deficient number, since it is larger than the sum of its proper divisors (165766683190).

221022244244 is a wasteful number, since it uses less digits than its factorization.

221022244244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55255561065 (or 55255561063 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 29.

Adding to 221022244244 its reverse (442442220122), we get a palindrome (663464464366).

The spelling of 221022244244 in words is "two hundred twenty-one billion, twenty-two million, two hundred forty-four thousand, two hundred forty-four".