111202221 has 16 divisors (see below), whose sum is σ = 159864320. Its totient is φ = 68351040.

The previous prime is 111202213. The next prime is 111202243. The reversal of 111202221 is 122202111.

It is not a de Polignac number, because 111202221 - 2³ = 111202213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111202197 and 111202206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111202261) 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, 62340 + ... + 64098.

It is an arithmetic number, because the mean of its divisors is an integer number (9991520).

Almost surely, 2^111202221 is an apocalyptic number.

It is an amenable number.

111202221 is a deficient number, since it is larger than the sum of its proper divisors (48662099).

111202221 is a wasteful number, since it uses less digits than its factorization.

111202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3396.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 111202221 is about 10545.2463698104. The cubic root of 111202221 is about 480.8812240672.

Adding to 111202221 its reverse (122202111), we get a palindrome (233404332).

The spelling of 111202221 in words is "one hundred eleven million, two hundred two thousand, two hundred twenty-one".