122212221 has 16 divisors (see below), whose sum is σ = 169861824. Its totient is φ = 78084864.

The previous prime is 122212213. The next prime is 122212247.

122212221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 122212221 - 2³ = 122212213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122212421) 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, 780 + ... + 15653.

It is an arithmetic number, because the mean of its divisors is an integer number (10616364).

Almost surely, 2^122212221 is an apocalyptic number.

It is an amenable number.

122212221 is a deficient number, since it is larger than the sum of its proper divisors (47649603).

122212221 is a wasteful number, since it uses less digits than its factorization.

122212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16540.

The product of its digits is 64, while the sum is 15.

The square root of 122212221 is about 11054.9636363038. The cubic root of 122212221 is about 496.2549810319.

The spelling of 122212221 in words is "one hundred twenty-two million, two hundred twelve thousand, two hundred twenty-one".