111000100221 has 8 divisors (see below), whose sum is σ = 164444592960. Its totient is φ = 74000066796.

The previous prime is 111000100213. The next prime is 111000100223. The reversal of 111000100221 is 122001000111.

It is a happy number.

It is not a de Polignac number, because 111000100221 - 2³ = 111000100213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111000100223) 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, 2055557385 + ... + 2055557438.

It is an arithmetic number, because the mean of its divisors is an integer number (20555574120).

Almost surely, 2^111000100221 is an apocalyptic number.

It is an amenable number.

111000100221 is a deficient number, since it is larger than the sum of its proper divisors (53444492739).

111000100221 is an equidigital number, since it uses as much as digits as its factorization.

111000100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4111114832 (or 4111114826 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 111000100221 its reverse (122001000111), we get a palindrome (233001100332).

The spelling of 111000100221 in words is "one hundred eleven billion, one hundred thousand, two hundred twenty-one".