22211000122221 has 6 divisors (see below), whose sum is σ = 32082555732110. Its totient is φ = 14807333414808.

The previous prime is 22211000122193. The next prime is 22211000122229. The reversal of 22211000122221 is 12222100011222.

It is a happy number.

22211000122221 is a `hidden beast` number, since 2 + 221 + 100 + 0 + 122 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19716530508900 + 2494469613321 = 4440330^2 + 1579389^2 .

It is not a de Polignac number, because 22211000122221 - 2⁷ = 22211000122093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22211000122194 and 22211000122203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211000122229) 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, 1233944451226 + ... + 1233944451243.

Almost surely, 2^{22211000122221} is an apocalyptic number.

It is an amenable number.

22211000122221 is a deficient number, since it is larger than the sum of its proper divisors (9871555609889).

22211000122221 is a wasteful number, since it uses less digits than its factorization.

22211000122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2467888902475 (or 2467888902472 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22211000122221 its reverse (12222100011222), we get a palindrome (34433100133443).

The spelling of 22211000122221 in words is "twenty-two trillion, two hundred eleven billion, one hundred twenty-two thousand, two hundred twenty-one".