22112202221221 has 8 divisors (see below), whose sum is σ = 25281365250240. Its totient is φ = 18945608441568.

The previous prime is 22112202221201. The next prime is 22112202221227. The reversal of 22112202221221 is 12212220221122.

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 22112202221221 - 2¹⁹ = 22112201696933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22112202221192 and 22112202221201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112202221227) 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 7 ways as a sum of consecutive naturals, for example, 642293896 + ... + 642328321.

It is an arithmetic number, because the mean of its divisors is an integer number (3160170656280).

Almost surely, 2^{22112202221221} is an apocalyptic number.

It is an amenable number.

22112202221221 is a deficient number, since it is larger than the sum of its proper divisors (3169163029019).

22112202221221 is a wasteful number, since it uses less digits than its factorization.

22112202221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284624683.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 22112202221221 its reverse (12212220221122), we get a palindrome (34324422442343).

The spelling of 22112202221221 in words is "twenty-two trillion, one hundred twelve billion, two hundred two million, two hundred twenty-one thousand, two hundred twenty-one".