22112211220221 has 16 divisors (see below), whose sum is σ = 30462318103680. Its totient is φ = 14259624200640.

The previous prime is 22112211220193. The next prime is 22112211220223. The reversal of 22112211220221 is 12202211221122.

It is not a de Polignac number, because 22112211220221 - 2⁶ = 22112211220157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112211220223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 979358506 + ... + 979381083.

It is an arithmetic number, because the mean of its divisors is an integer number (1903894881480).

Almost surely, 2^{22112211220221} is an apocalyptic number.

It is an amenable number.

22112211220221 is a deficient number, since it is larger than the sum of its proper divisors (8350106883459).

22112211220221 is a wasteful number, since it uses less digits than its factorization.

22112211220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958739716.

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

Adding to 22112211220221 its reverse (12202211221122), we get a palindrome (34314422441343).

Subtracting from 22112211220221 its reverse (12202211221122), we obtain a palindrome (9909999999099).

The spelling of 22112211220221 in words is "twenty-two trillion, one hundred twelve billion, two hundred eleven million, two hundred twenty thousand, two hundred twenty-one".