111210221 has 8 divisors (see below), whose sum is σ = 118013760. Its totient is φ = 104570752.

The previous prime is 111210199. The next prime is 111210241. The reversal of 111210221 is 122012111.

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 111210221 - 2²² = 107015917 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 (111210241) 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, 39620 + ... + 42333.

It is an arithmetic number, because the mean of its divisors is an integer number (14751720).

Almost surely, 2^111210221 is an apocalyptic number.

It is an amenable number.

111210221 is a deficient number, since it is larger than the sum of its proper divisors (6803539).

111210221 is an equidigital number, since it uses as much as digits as its factorization.

111210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82035.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 111210221 is about 10545.6256808214. The cubic root of 111210221 is about 480.8927554842.

Adding to 111210221 its reverse (122012111), we get a palindrome (233222332).

The spelling of 111210221 in words is "one hundred eleven million, two hundred ten thousand, two hundred twenty-one".