111022221 has 8 divisors (see below), whose sum is σ = 148256224. Its totient is φ = 73901520.

The previous prime is 111022217. The next prime is 111022243. The reversal of 111022221 is 122220111.

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

It is not a de Polignac number, because 111022221 - 2² = 111022217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111022197 and 111022206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111022321) 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, 26011 + ... + 29976.

It is an arithmetic number, because the mean of its divisors is an integer number (18532028).

Almost surely, 2^111022221 is an apocalyptic number.

It is an amenable number.

111022221 is a deficient number, since it is larger than the sum of its proper divisors (37234003).

111022221 is an equidigital number, since it uses as much as digits as its factorization.

111022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56651.

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

The square root of 111022221 is about 10536.7082620712. The cubic root of 111022221 is about 480.6216208418.

Adding to 111022221 its reverse (122220111), we get a palindrome (233242332).

The spelling of 111022221 in words is "one hundred eleven million, twenty-two thousand, two hundred twenty-one".