122222102221 has 16 divisors (see below), whose sum is σ = 127405502640. Its totient is φ = 117103920640.

The previous prime is 122222102131. The next prime is 122222102231. The reversal of 122222102221 is 122201222221.

It can be written as a sum of positive squares in 8 ways, for example, as 8934121 + 122213168100 = 2989^2 + 349590^2 .

It is a cyclic number.

It is not a de Polignac number, because 122222102221 - 2⁹ = 122222101709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122222102231) 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 15 ways as a sum of consecutive naturals, for example, 21375855 + ... + 21381571.

It is an arithmetic number, because the mean of its divisors is an integer number (7962843915).

Almost surely, 2^122222102221 is an apocalyptic number.

It is an amenable number.

122222102221 is a deficient number, since it is larger than the sum of its proper divisors (5183400419).

122222102221 is a wasteful number, since it uses less digits than its factorization.

122222102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11264.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 122222102221 its reverse (122201222221), we get a palindrome (244423324442).

The spelling of 122222102221 in words is "one hundred twenty-two billion, two hundred twenty-two million, one hundred two thousand, two hundred twenty-one".