22110002111221 has 4 divisors (see below), whose sum is σ = 22110047738892. Its totient is φ = 22109956483552.

The previous prime is 22110002111213. The next prime is 22110002111231. The reversal of 22110002111221 is 12211120001122.

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 16302528694321 + 5807473416900 = 4037639^2 + 2409870^2 .

It is a cyclic number.

It is not a de Polignac number, because 22110002111221 - 2³ = 22110002111213 is a prime.

It is a super-2 number, since 2×22110002111221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22110002111195 and 22110002111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22110002111201) 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, 22079086 + ... + 23058751.

It is an arithmetic number, because the mean of its divisors is an integer number (5527511934723).

Almost surely, 2^{22110002111221} is an apocalyptic number.

It is an amenable number.

22110002111221 is a deficient number, since it is larger than the sum of its proper divisors (45627671).

22110002111221 is an equidigital number, since it uses as much as digits as its factorization.

22110002111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45627670.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 22110002111221 its reverse (12211120001122), we get a palindrome (34321122112343).

The spelling of 22110002111221 in words is "twenty-two trillion, one hundred ten billion, two million, one hundred eleven thousand, two hundred twenty-one".