122221211221 has 16 divisors (see below), whose sum is σ = 129977770176. Its totient is φ = 114528750336.

The previous prime is 122221211159. The next prime is 122221211237. The reversal of 122221211221 is 122112122221.

It is a cyclic number.

It is not a de Polignac number, because 122221211221 - 2¹³ = 122221203029 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 (122221212221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3675150 + ... + 3708256.

It is an arithmetic number, because the mean of its divisors is an integer number (8123610636).

Almost surely, 2^122221211221 is an apocalyptic number.

It is an amenable number.

122221211221 is a deficient number, since it is larger than the sum of its proper divisors (7756558955).

122221211221 is a wasteful number, since it uses less digits than its factorization.

122221211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34068.

The product of its digits is 128, while the sum is 19.

Adding to 122221211221 its reverse (122112122221), we get a palindrome (244333333442).

The spelling of 122221211221 in words is "one hundred twenty-two billion, two hundred twenty-one million, two hundred eleven thousand, two hundred twenty-one".