221311221232 has 20 divisors (see below), whose sum is σ = 436058128440. Its totient is φ = 108780091328.

The previous prime is 221311221221. The next prime is 221311221251. The reversal of 221311221232 is 232122113122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117218983 + ... + 117220870.

It is an arithmetic number, because the mean of its divisors is an integer number (21802906422).

Almost surely, 2^221311221232 is an apocalyptic number.

It is an amenable number.

221311221232 is a deficient number, since it is larger than the sum of its proper divisors (214746907208).

221311221232 is a wasteful number, since it uses less digits than its factorization.

221311221232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234439920 (or 234439914 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

Adding to 221311221232 its reverse (232122113122), we get a palindrome (453433334354).

The spelling of 221311221232 in words is "two hundred twenty-one billion, three hundred eleven million, two hundred twenty-one thousand, two hundred thirty-two".