221311142344 has 8 divisors (see below), whose sum is σ = 414958391910. Its totient is φ = 110655571168.

The previous prime is 221311142287. The next prime is 221311142369. The reversal of 221311142344 is 443241113122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 197429148900 + 23881993444 = 444330^2 + 154538^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13831946389 + ... + 13831946404.

Almost surely, 2^221311142344 is an apocalyptic number.

It is an amenable number.

221311142344 is a deficient number, since it is larger than the sum of its proper divisors (193647249566).

221311142344 is a wasteful number, since it uses less digits than its factorization.

221311142344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27663892799 (or 27663892795 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

Adding to 221311142344 its reverse (443241113122), we get a palindrome (664552255466).

The spelling of 221311142344 in words is "two hundred twenty-one billion, three hundred eleven million, one hundred forty-two thousand, three hundred forty-four".