111021100221 has 4 divisors (see below), whose sum is σ = 148028133632. Its totient is φ = 74014066812.

The previous prime is 111021100207. The next prime is 111021100231. The reversal of 111021100221 is 122001120111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 111021100221 - 2⁷ = 111021100093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111021100197 and 111021100206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021100231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18503516701 + ... + 18503516706.

It is an arithmetic number, because the mean of its divisors is an integer number (37007033408).

Almost surely, 2^111021100221 is an apocalyptic number.

It is an amenable number.

111021100221 is a deficient number, since it is larger than the sum of its proper divisors (37007033411).

111021100221 is an equidigital number, since it uses as much as digits as its factorization.

111021100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37007033410.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111021100221 its reverse (122001120111), we get a palindrome (233022220332).

The spelling of 111021100221 in words is "one hundred eleven billion, twenty-one million, one hundred thousand, two hundred twenty-one".