111102211020221 has 8 divisors (see below), whose sum is σ = 113198655843000. Its totient is φ = 109005772741632.

The previous prime is 111102211020187. The next prime is 111102211020233. The reversal of 111102211020221 is 122020112201111.

It can be written as a sum of positive squares in 4 ways, for example, as 71336436288100 + 39765774732121 = 8446090^2 + 6306011^2 .

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 111102211020221 - 2²² = 111102206825917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111102211020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111102211022221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45136301 + ... + 47534093.

It is an arithmetic number, because the mean of its divisors is an integer number (14149831980375).

Almost surely, 2^{111102211020221} is an apocalyptic number.

It is an amenable number.

111102211020221 is a deficient number, since it is larger than the sum of its proper divisors (2096444822779).

111102211020221 is an equidigital number, since it uses as much as digits as its factorization.

111102211020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3272095.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111102211020221 its reverse (122020112201111), we get a palindrome (233122323221332).

The spelling of 111102211020221 in words is "one hundred eleven trillion, one hundred two billion, two hundred eleven million, twenty thousand, two hundred twenty-one".