122201222221 has 16 divisors (see below), whose sum is σ = 136264307760. Its totient is φ = 108811422720.

The previous prime is 122201222201. The next prime is 122201222233. The reversal of 122201222221 is 122222102221.

It can be written as a sum of positive squares in 8 ways, for example, as 27660346596 + 94540875625 = 166314^2 + 307475^2 .

It is not a de Polignac number, because 122201222221 - 2⁵ = 122201222189 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 (122201222201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263781 + ... + 560341.

It is an arithmetic number, because the mean of its divisors is an integer number (8516519235).

Almost surely, 2^122201222221 is an apocalyptic number.

It is an amenable number.

122201222221 is a deficient number, since it is larger than the sum of its proper divisors (14063085539).

122201222221 is a wasteful number, since it uses less digits than its factorization.

122201222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297696.

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

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

The spelling of 122201222221 in words is "one hundred twenty-two billion, two hundred one million, two hundred twenty-two thousand, two hundred twenty-one".