22110110121221 has 8 divisors (see below), whose sum is σ = 23414908688280. Its totient is φ = 20805778649088.

The previous prime is 22110110121217. The next prime is 22110110121233. The reversal of 22110110121221 is 12212101101122.

It can be written as a sum of positive squares in 4 ways, for example, as 2820569097025 + 19289541024196 = 1679455^2 + 4391986^2 .

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 22110110121221 - 2² = 22110110121217 is a prime.

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

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 22110110121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22110112121221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116676266 + ... + 116865611.

It is an arithmetic number, because the mean of its divisors is an integer number (2926863586035).

Almost surely, 2^{22110110121221} is an apocalyptic number.

It is an amenable number.

22110110121221 is a deficient number, since it is larger than the sum of its proper divisors (1304798567059).

22110110121221 is a wasteful number, since it uses less digits than its factorization.

22110110121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233547463.

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

Adding to 22110110121221 its reverse (12212101101122), we get a palindrome (34322211222343).

The spelling of 22110110121221 in words is "twenty-two trillion, one hundred ten billion, one hundred ten million, one hundred twenty-one thousand, two hundred twenty-one".