22100022221 has 12 divisors (see below), whose sum is σ = 22361344512. Its totient is φ = 21840393456.

The previous prime is 22100022211. The next prime is 22100022223. The reversal of 22100022221 is 12222000122.

It is not a de Polignac number, because 22100022221 - 2¹⁰ = 22100021197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22100022196 and 22100022205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22100022223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10901810 + ... + 10903836.

It is an arithmetic number, because the mean of its divisors is an integer number (1863445376).

Almost surely, 2^22100022221 is an apocalyptic number.

It is an amenable number.

22100022221 is a deficient number, since it is larger than the sum of its proper divisors (261322291).

22100022221 is an equidigital number, since it uses as much as digits as its factorization.

22100022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740 (or 2447 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 22100022221 its reverse (12222000122), we get a palindrome (34322022343).

The spelling of 22100022221 in words is "twenty-two billion, one hundred million, twenty-two thousand, two hundred twenty-one".