122222022221 has 8 divisors (see below), whose sum is σ = 133426781880. Its totient is φ = 111274843392.

The previous prime is 122222022211. The next prime is 122222022227. The reversal of 122222022221 is 122220222221.

It can be written as a sum of positive squares in 4 ways, for example, as 40557529321 + 81664492900 = 201389^2 + 285770^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 122222022221 - 2⁶ = 122222022157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 122222022193 and 122222022202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122222022227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64394216 + ... + 64396113.

It is an arithmetic number, because the mean of its divisors is an integer number (16678347735).

Almost surely, 2^122222022221 is an apocalyptic number.

It is an amenable number.

122222022221 is a deficient number, since it is larger than the sum of its proper divisors (11204759659).

122222022221 is a wasteful number, since it uses less digits than its factorization.

122222022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128790415.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 122222022221 its reverse (122220222221), we get a palindrome (244442244442).

It can be divided in two parts, 1 and 22222022221, that added together give a palindrome (22222022222).

The spelling of 122222022221 in words is "one hundred twenty-two billion, two hundred twenty-two million, twenty-two thousand, two hundred twenty-one".