22100022205 has 4 divisors (see below), whose sum is σ = 26520026652. Its totient is φ = 17680017760.

The previous prime is 22100022193. The next prime is 22100022209. The reversal of 22100022205 is 50222000122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6470271844 + 15629750361 = 80438^2 + 125019^2 .

It is a de Polignac number, because none of the positive numbers 2^k-22100022205 is a prime.

It is a super-2 number, since 2×22100022205² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22100022209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2210002216 + ... + 2210002225.

It is an arithmetic number, because the mean of its divisors is an integer number (6630006663).

Almost surely, 2^22100022205 is an apocalyptic number.

It is an amenable number.

22100022205 is a deficient number, since it is larger than the sum of its proper divisors (4420004447).

22100022205 is an equidigital number, since it uses as much as digits as its factorization.

22100022205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4420004446.

The product of its (nonzero) digits is 160, while the sum is 16.

Adding to 22100022205 its reverse (50222000122), we get a palindrome (72322022327).

The spelling of 22100022205 in words is "twenty-two billion, one hundred million, twenty-two thousand, two hundred five".