221223224111 has 4 divisors (see below), whose sum is σ = 223180951872. Its totient is φ = 219265496352.

The previous prime is 221223224021. The next prime is 221223224129. The reversal of 221223224111 is 111422322122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111422322122 = 2 ⋅55711161061.

It is a cyclic number.

It is not a de Polignac number, because 221223224111 - 2²² = 221219029807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221223221111) 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, 978863711 + ... + 978863936.

It is an arithmetic number, because the mean of its divisors is an integer number (55795237968).

Almost surely, 2^221223224111 is an apocalyptic number.

221223224111 is a deficient number, since it is larger than the sum of its proper divisors (1957727761).

221223224111 is a wasteful number, since it uses less digits than its factorization.

221223224111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957727760.

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

Adding to 221223224111 its reverse (111422322122), we get a palindrome (332645546233).

The spelling of 221223224111 in words is "two hundred twenty-one billion, two hundred twenty-three million, two hundred twenty-four thousand, one hundred eleven".