22112211212221 has 8 divisors (see below), whose sum is σ = 23937826719744. Its totient is φ = 20304406588080.

The previous prime is 22112211212209. The next prime is 22112211212227. The reversal of 22112211212221 is 12221211221122.

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 22112211212221 - 2¹⁹ = 22112210687933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22112211212192 and 22112211212201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112211212227) 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, 4452718261 + ... + 4452723226.

It is an arithmetic number, because the mean of its divisors is an integer number (2992228339968).

Almost surely, 2^{22112211212221} is an apocalyptic number.

It is an amenable number.

22112211212221 is a deficient number, since it is larger than the sum of its proper divisors (1825615507523).

22112211212221 is a wasteful number, since it uses less digits than its factorization.

22112211212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8905441691.

The product of its digits is 256, while the sum is 22.

Adding to 22112211212221 its reverse (12221211221122), we get a palindrome (34333422433343).

The spelling of 22112211212221 in words is "twenty-two trillion, one hundred twelve billion, two hundred eleven million, two hundred twelve thousand, two hundred twenty-one".