122211221211 has 24 divisors (see below), whose sum is σ = 184715631360. Its totient is φ = 77714665776.

The previous prime is 122211221183. The next prime is 122211221219. The reversal of 122211221211 is 112122112221.

122211221211 is a `hidden beast` number, since 1 + 22 + 211 + 221 + 211 = 666.

It is not a de Polignac number, because 122211221211 - 2⁶ = 122211221147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122211221219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 747961 + ... + 896586.

It is an arithmetic number, because the mean of its divisors is an integer number (7696484640).

Almost surely, 2^122211221211 is an apocalyptic number.

122211221211 is a deficient number, since it is larger than the sum of its proper divisors (62504410149).

122211221211 is a wasteful number, since it uses less digits than its factorization.

122211221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644935 (or 1644932 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

Adding to 122211221211 its reverse (112122112221), we get a palindrome (234333333432).

The spelling of 122211221211 in words is "one hundred twenty-two billion, two hundred eleven million, two hundred twenty-one thousand, two hundred eleven".