110111101212221 has 4 divisors (see below), whose sum is σ = 110111297127132. Its totient is φ = 110110905297312.

The previous prime is 110111101212187. The next prime is 110111101212241. The reversal of 110111101212221 is 122212101111011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66624594187321 + 43486507024900 = 8162389^2 + 6594430^2 .

It is a cyclic number.

It is not a de Polignac number, because 110111101212221 - 2⁶ = 110111101212157 is a prime.

It is a super-2 number, since 2×110111101212221² (a number of 29 digits) contains 22 as substring.

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 110111101212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110111101212241) 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, 97111970 + ... + 98239283.

It is an arithmetic number, because the mean of its divisors is an integer number (27527824281783).

Almost surely, 2^{110111101212221} is an apocalyptic number.

It is an amenable number.

110111101212221 is a deficient number, since it is larger than the sum of its proper divisors (195914911).

110111101212221 is an equidigital number, since it uses as much as digits as its factorization.

110111101212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195914910.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 110111101212221 its reverse (122212101111011), we get a palindrome (232323202323232).

The spelling of 110111101212221 in words is "one hundred ten trillion, one hundred eleven billion, one hundred one million, two hundred twelve thousand, two hundred twenty-one".