221234443111 has 8 divisors (see below), whose sum is σ = 241351173648. Its totient is φ = 201118464000.

The previous prime is 221234443093. The next prime is 221234443123. The reversal of 221234443111 is 111344432122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221234443111 - 2¹⁵ = 221234410343 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221234443111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221234443811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 555751 + ... + 866791.

It is an arithmetic number, because the mean of its divisors is an integer number (30168896706).

Almost surely, 2^221234443111 is an apocalyptic number.

221234443111 is a deficient number, since it is larger than the sum of its proper divisors (20116730537).

221234443111 is a wasteful number, since it uses less digits than its factorization.

221234443111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375713.

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

Adding to 221234443111 its reverse (111344432122), we get a palindrome (332578875233).

The spelling of 221234443111 in words is "two hundred twenty-one billion, two hundred thirty-four million, four hundred forty-three thousand, one hundred eleven".