110212120011221 has 24 divisors (see below), whose sum is σ = 119550558398040. Its totient is φ = 101249863022592.

The previous prime is 110212120011173. The next prime is 110212120011241. The reversal of 110212120011221 is 122110021212011.

It can be written as a sum of positive squares in 4 ways, for example, as 7828300368100 + 102383819643121 = 2797910^2 + 10118489^2 .

It is not a de Polignac number, because 110212120011221 - 2¹⁸ = 110212119749077 is a prime.

It is a super-2 number, since 2×110212120011221² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 110212120011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110212120011241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10073165 + ... + 17941373.

It is an arithmetic number, because the mean of its divisors is an integer number (4981273266585).

Almost surely, 2^{110212120011221} is an apocalyptic number.

It is an amenable number.

110212120011221 is a deficient number, since it is larger than the sum of its proper divisors (9338438386819).

110212120011221 is an equidigital number, since it uses as much as digits as its factorization.

110212120011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7868693 (or 7868646 counting only the distinct ones).

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

Adding to 110212120011221 its reverse (122110021212011), we get a palindrome (232322141223232).

The spelling of 110212120011221 in words is "one hundred ten trillion, two hundred twelve billion, one hundred twenty million, eleven thousand, two hundred twenty-one".