111343221 has 16 divisors (see below), whose sum is σ = 179949120. Its totient is φ = 67480560.

The previous prime is 111343201. The next prime is 111343229. The reversal of 111343221 is 122343111.

It is not a de Polignac number, because 111343221 - 2⁵ = 111343189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111343194 and 111343203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111343229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187150 + ... + 187743.

It is an arithmetic number, because the mean of its divisors is an integer number (11246820).

Almost surely, 2^111343221 is an apocalyptic number.

111343221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111343221 is a deficient number, since it is larger than the sum of its proper divisors (68605899).

111343221 is a wasteful number, since it uses less digits than its factorization.

111343221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374913 (or 374907 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 111343221 is about 10551.9297287273. The cubic root of 111343221 is about 481.0843843232.

Adding to 111343221 its reverse (122343111), we get a palindrome (233686332).

The spelling of 111343221 in words is "one hundred eleven million, three hundred forty-three thousand, two hundred twenty-one".