21222323321121 has 48 divisors (see below), whose sum is σ = 33228337798656. Its totient is φ = 12974776760448.

The previous prime is 21222323321117. The next prime is 21222323321159. The reversal of 21222323321121 is 12112332322212.

21222323321121 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 2 + 323 + 321 + 12 + 1 = 666.

It is not a de Polignac number, because 21222323321121 - 2² = 21222323321117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21222323321161) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10353331 + ... + 12232583.

It is an arithmetic number, because the mean of its divisors is an integer number (692257037472).

Almost surely, 2^{21222323321121} is an apocalyptic number.

It is an amenable number.

21222323321121 is a deficient number, since it is larger than the sum of its proper divisors (12006014477535).

21222323321121 is a wasteful number, since it uses less digits than its factorization.

21222323321121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1879902 (or 1879899 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 21222323321121 its reverse (12112332322212), we get a palindrome (33334655643333).

The spelling of 21222323321121 in words is "twenty-one trillion, two hundred twenty-two billion, three hundred twenty-three million, three hundred twenty-one thousand, one hundred twenty-one".