12221201210121 has 12 divisors (see below), whose sum is σ = 17787600745200. Its totient is φ = 8085273064440.

The previous prime is 12221201210089. The next prime is 12221201210143. The reversal of 12221201210121 is 12101210212221.

12221201210121 is a `hidden beast` number, since 12 + 221 + 201 + 210 + 1 + 21 = 666.

It is not a de Polignac number, because 12221201210121 - 2⁵ = 12221201210089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12221201210094 and 12221201210103.

It is not an unprimeable number, because it can be changed into a prime (12221201210191) 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 11 ways as a sum of consecutive naturals, for example, 5182866171 + ... + 5182868528.

It is an arithmetic number, because the mean of its divisors is an integer number (1482300062100).

Almost surely, 2^{12221201210121} is an apocalyptic number.

It is an amenable number.

12221201210121 is a deficient number, since it is larger than the sum of its proper divisors (5566399535079).

12221201210121 is a wasteful number, since it uses less digits than its factorization.

12221201210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10365734836 (or 10365734833 counting only the distinct ones).

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

Adding to 12221201210121 its reverse (12101210212221), we get a palindrome (24322411422342).

The spelling of 12221201210121 in words is "twelve trillion, two hundred twenty-one billion, two hundred one million, two hundred ten thousand, one hundred twenty-one".