221224043331 has 24 divisors (see below), whose sum is σ = 328757920400. Its totient is φ = 143291275776.

The previous prime is 221224043269. The next prime is 221224043407. The reversal of 221224043331 is 133340422122.

221224043331 is a `hidden beast` number, since 2 + 2 + 1 + 224 + 0 + 433 + 3 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-221224043331 is a prime.

It is a super-2 number, since 2×221224043331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221224043295 and 221224043304.

It is not an unprimeable number, because it can be changed into a prime (221224041331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2468806 + ... + 2556843.

Almost surely, 2^221224043331 is an apocalyptic number.

221224043331 is a deficient number, since it is larger than the sum of its proper divisors (107533877069).

221224043331 is a wasteful number, since it uses less digits than its factorization.

221224043331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5025795 (or 5025792 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 221224043331 its reverse (133340422122), we get a palindrome (354564465453).

The spelling of 221224043331 in words is "two hundred twenty-one billion, two hundred twenty-four million, forty-three thousand, three hundred thirty-one".