22112211022221 has 16 divisors (see below), whose sum is σ = 31825671039360. Its totient is φ = 13614314831040.

The previous prime is 22112211022211. The next prime is 22112211022249. The reversal of 22112211022221 is 12222011221122.

It is not a de Polignac number, because 22112211022221 - 2⁵ = 22112211022189 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112211022201) 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 15 ways as a sum of consecutive naturals, for example, 5525288110 + ... + 5525292111.

It is an arithmetic number, because the mean of its divisors is an integer number (1989104439960).

Almost surely, 2^{22112211022221} is an apocalyptic number.

It is an amenable number.

22112211022221 is a deficient number, since it is larger than the sum of its proper divisors (9713460017139).

22112211022221 is a wasteful number, since it uses less digits than its factorization.

22112211022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11050580276.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 22112211022221 its reverse (12222011221122), we get a palindrome (34334222243343).

The spelling of 22112211022221 in words is "twenty-two trillion, one hundred twelve billion, two hundred eleven million, twenty-two thousand, two hundred twenty-one".