12201110122221 has 96 divisors (see below), whose sum is σ = 19348157337600. Its totient is φ = 7387236702720.

The previous prime is 12201110122207. The next prime is 12201110122249. The reversal of 12201110122221 is 12222101110221.

12201110122221 is a `hidden beast` number, since 12 + 201 + 110 + 122 + 221 = 666.

It is not a de Polignac number, because 12201110122221 - 2¹⁰ = 12201110121197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12201110122194 and 12201110122203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201110122021) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 298448460 + ... + 298489338.

It is an arithmetic number, because the mean of its divisors is an integer number (201543305600).

Almost surely, 2^{12201110122221} is an apocalyptic number.

It is an amenable number.

12201110122221 is a deficient number, since it is larger than the sum of its proper divisors (7147047215379).

12201110122221 is a wasteful number, since it uses less digits than its factorization.

12201110122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41979 (or 41976 counting only the distinct ones).

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

Adding to 12201110122221 its reverse (12222101110221), we get a palindrome (24423211232442).

The spelling of 12201110122221 in words is "twelve trillion, two hundred one billion, one hundred ten million, one hundred twenty-two thousand, two hundred twenty-one".