221132212443 has 12 divisors (see below), whose sum is σ = 336224416840. Its totient is φ = 139662449856.

The previous prime is 221132212439. The next prime is 221132212591. The reversal of 221132212443 is 344212231122.

221132212443 is a `hidden beast` number, since 2 + 2 + 1 + 1 + 3 + 2 + 212 + 443 = 666.

It is not a de Polignac number, because 221132212443 - 2² = 221132212439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221132212423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 646585246 + ... + 646585587.

Almost surely, 2^221132212443 is an apocalyptic number.

221132212443 is a deficient number, since it is larger than the sum of its proper divisors (115092204397).

221132212443 is a wasteful number, since it uses less digits than its factorization.

221132212443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293170858 (or 1293170855 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 221132212443 its reverse (344212231122), we get a palindrome (565344443565).

The spelling of 221132212443 in words is "two hundred twenty-one billion, one hundred thirty-two million, two hundred twelve thousand, four hundred forty-three".