22200212222221 has 4 divisors (see below), whose sum is σ = 24218413333344. Its totient is φ = 20182011111100.

The previous prime is 22200212222203. The next prime is 22200212222239. The reversal of 22200212222221 is 12222221200222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (22200212222203) and next prime (22200212222239).

It is a cyclic number.

It is not a de Polignac number, because 22200212222221 - 2¹⁹ = 22200211697933 is a prime.

It is a super-3 number, since 3×22200212222221³ (a number of 41 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22200212222192 and 22200212222201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22200212223221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1009100555545 + ... + 1009100555566.

It is an arithmetic number, because the mean of its divisors is an integer number (6054603333336).

Almost surely, 2^{22200212222221} is an apocalyptic number.

It is an amenable number.

22200212222221 is a deficient number, since it is larger than the sum of its proper divisors (2018201111123).

22200212222221 is a wasteful number, since it uses less digits than its factorization.

22200212222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2018201111122.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 22200212222221 its reverse (12222221200222), we get a palindrome (34422433422443).

The spelling of 22200212222221 in words is "twenty-two trillion, two hundred billion, two hundred twelve million, two hundred twenty-two thousand, two hundred twenty-one".