12221220110121 has 48 divisors (see below), whose sum is σ = 20499009336000. Its totient is φ = 6938126046720.

The previous prime is 12221220110117. The next prime is 12221220110129. The reversal of 12221220110121 is 12101102212221.

12221220110121 is a `hidden beast` number, since 122 + 212 + 201 + 10 + 121 = 666.

It is not a de Polignac number, because 12221220110121 - 2² = 12221220110117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12221220110094 and 12221220110103.

It is not an unprimeable number, because it can be changed into a prime (12221220110129) 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, 36333676 + ... + 36668493.

It is an arithmetic number, because the mean of its divisors is an integer number (427062694500).

Almost surely, 2^{12221220110121} is an apocalyptic number.

12221220110121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12221220110121 is a deficient number, since it is larger than the sum of its proper divisors (8277789225879).

12221220110121 is a wasteful number, since it uses less digits than its factorization.

12221220110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73002294 (or 73002291 counting only the distinct ones).

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

Adding to 12221220110121 its reverse (12101102212221), we get a palindrome (24322322322342).

The spelling of 12221220110121 in words is "twelve trillion, two hundred twenty-one billion, two hundred twenty million, one hundred ten thousand, one hundred twenty-one".