111020221 has 8 divisors (see below), whose sum is σ = 119909664. Its totient is φ = 102180720.

The previous prime is 111020209. The next prime is 111020227. The reversal of 111020221 is 122020111.

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 111020221 - 2²¹ = 108923069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111020198 and 111020207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020227) 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, 7795 + ... + 16816.

It is an arithmetic number, because the mean of its divisors is an integer number (14988708).

Almost surely, 2^111020221 is an apocalyptic number.

It is an amenable number.

111020221 is a deficient number, since it is larger than the sum of its proper divisors (8889443).

111020221 is a wasteful number, since it uses less digits than its factorization.

111020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24971.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 111020221 is about 10536.6133553434. The cubic root of 111020221 is about 480.6187347859.

Adding to 111020221 its reverse (122020111), we get a palindrome (233040332).

The spelling of 111020221 in words is "one hundred eleven million, twenty thousand, two hundred twenty-one".