221202011444 has 6 divisors (see below), whose sum is σ = 387103520034. Its totient is φ = 110601005720.

The previous prime is 221202011441. The next prime is 221202011449. The reversal of 221202011444 is 444110202122.

It can be written as a sum of positive squares in only one way, i.e., 163620250000 + 57581761444 = 404500^2 + 239962^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221202011441) 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 as a sum of consecutive naturals, namely, 27650251427 + ... + 27650251434.

It is an arithmetic number, because the mean of its divisors is an integer number (64517253339).

Almost surely, 2^221202011444 is an apocalyptic number.

It is an amenable number.

221202011444 is a deficient number, since it is larger than the sum of its proper divisors (165901508590).

221202011444 is a wasteful number, since it uses less digits than its factorization.

221202011444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55300502865 (or 55300502863 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 221202011444 its reverse (444110202122), we get a palindrome (665312213566).

The spelling of 221202011444 in words is "two hundred twenty-one billion, two hundred two million, eleven thousand, four hundred forty-four".