110212122221 has 4 divisors (see below), whose sum is σ = 116695188252. Its totient is φ = 103729056192.

The previous prime is 110212122199. The next prime is 110212122233. The reversal of 110212122221 is 122221212011.

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 87264114025 + 22948008196 = 295405^2 + 151486^2 .

It is a cyclic number.

It is not a de Polignac number, because 110212122221 - 2¹⁴ = 110212105837 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 6483066013 = 110212122221 / (1 + 1 + 0 + 2 + 1 + 2 + 1 + 2 + 2 + 2 + 2 + 1).

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 110212122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110212122271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3241532990 + ... + 3241533023.

It is an arithmetic number, because the mean of its divisors is an integer number (29173797063).

Almost surely, 2^110212122221 is an apocalyptic number.

It is an amenable number.

110212122221 is a deficient number, since it is larger than the sum of its proper divisors (6483066031).

110212122221 is an equidigital number, since it uses as much as digits as its factorization.

110212122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6483066030.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 110212122221 its reverse (122221212011), we get a palindrome (232433334232).

The spelling of 110212122221 in words is "one hundred ten billion, two hundred twelve million, one hundred twenty-two thousand, two hundred twenty-one".