221131104224 has 24 divisors (see below), whose sum is σ = 436086050400. Its totient is φ = 110379091456.

The previous prime is 221131104223. The next prime is 221131104241. The reversal of 221131104224 is 422401131122.

It is a self number, because there is not a number n which added to its sum of digits gives 221131104224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221131104223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5807624 + ... + 5845575.

It is an arithmetic number, because the mean of its divisors is an integer number (18170252100).

Almost surely, 2^221131104224 is an apocalyptic number.

It is an amenable number.

221131104224 is a deficient number, since it is larger than the sum of its proper divisors (214954946176).

221131104224 is a wasteful number, since it uses less digits than its factorization.

221131104224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11653802 (or 11653794 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 221131104224 its reverse (422401131122), we get a palindrome (643532235346).

The spelling of 221131104224 in words is "two hundred twenty-one billion, one hundred thirty-one million, one hundred four thousand, two hundred twenty-four".