22110221221 has 6 divisors (see below), whose sum is σ = 24302970566. Its totient is φ = 20100201000.

The previous prime is 22110221219. The next prime is 22110221261. The reversal of 22110221221 is 12212201122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21970650625 + 139570596 = 148225^2 + 11814^2 .

It is not a de Polignac number, because 22110221221 - 2¹ = 22110221219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22110221195 and 22110221204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22110221261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 91364430 + ... + 91364671.

Almost surely, 2^22110221221 is an apocalyptic number.

It is an amenable number.

22110221221 is a deficient number, since it is larger than the sum of its proper divisors (2192749345).

22110221221 is a wasteful number, since it uses less digits than its factorization.

22110221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182729123 (or 182729112 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22110221221 its reverse (12212201122), we get a palindrome (34322422343).

The spelling of 22110221221 in words is "twenty-two billion, one hundred ten million, two hundred twenty-one thousand, two hundred twenty-one".