21222102110121 has 24 divisors (see below), whose sum is σ = 33444045520704. Its totient is φ = 12860665702560.

The previous prime is 21222102110117. The next prime is 21222102110161. The reversal of 21222102110121 is 12101120122212.

21222102110121 is a `hidden beast` number, since 2 + 122 + 210 + 211 + 0 + 121 = 666.

It is not a de Polignac number, because 21222102110121 - 2² = 21222102110117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21222102110094 and 21222102110103.

It is not an unprimeable number, because it can be changed into a prime (21222102110161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9065301 + ... + 11163506.

It is an arithmetic number, because the mean of its divisors is an integer number (1393501896696).

Almost surely, 2^{21222102110121} is an apocalyptic number.

It is an amenable number.

21222102110121 is a deficient number, since it is larger than the sum of its proper divisors (12221943410583).

21222102110121 is a wasteful number, since it uses less digits than its factorization.

21222102110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20239421 (or 20239418 counting only the distinct ones).

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

Adding to 21222102110121 its reverse (12101120122212), we get a palindrome (33323222232333).

The spelling of 21222102110121 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred two million, one hundred ten thousand, one hundred twenty-one".