122212222221 has 16 divisors (see below), whose sum is σ = 167461257600. Its totient is φ = 79221832128.

The previous prime is 122212222201. The next prime is 122212222243. The reversal of 122212222221 is 122222212221.

It is not a de Polignac number, because 122212222221 - 2¹⁷ = 122212091149 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122212222201) 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, 180066 + ... + 526163.

It is an arithmetic number, because the mean of its divisors is an integer number (10466328600).

Almost surely, 2^122212222221 is an apocalyptic number.

It is an amenable number.

122212222221 is a deficient number, since it is larger than the sum of its proper divisors (45249035379).

122212222221 is a wasteful number, since it uses less digits than its factorization.

122212222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707828.

The product of its digits is 512, while the sum is 21.

Adding to 122212222221 its reverse (122222212221), we get a palindrome (244434434442).

The spelling of 122212222221 in words is "one hundred twenty-two billion, two hundred twelve million, two hundred twenty-two thousand, two hundred twenty-one".