221311111043 has 8 divisors (see below), whose sum is σ = 241491210240. Its totient is φ = 201141163080.

The previous prime is 221311111031. The next prime is 221311111093. The reversal of 221311111043 is 340111113122.

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

It is not a de Polignac number, because 221311111043 - 2²⁸ = 221042675587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221311111003) 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, 2492183 + ... + 2579456.

It is an arithmetic number, because the mean of its divisors is an integer number (30186401280).

Almost surely, 2^221311111043 is an apocalyptic number.

221311111043 is a deficient number, since it is larger than the sum of its proper divisors (20180099197).

221311111043 is a wasteful number, since it uses less digits than its factorization.

221311111043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5075617.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 221311111043 its reverse (340111113122), we get a palindrome (561422224165).

The spelling of 221311111043 in words is "two hundred twenty-one billion, three hundred eleven million, one hundred eleven thousand, forty-three".