12210212120121 has 32 divisors (see below), whose sum is σ = 18431280000000. Its totient is φ = 7986219681024.

The previous prime is 12210212120089. The next prime is 12210212120129. The reversal of 12210212120121 is 12102121201221.

12210212120121 is a `hidden beast` number, since 1 + 2 + 210 + 212 + 120 + 121 = 666.

It is not a de Polignac number, because 12210212120121 - 2⁵ = 12210212120089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12210212120094 and 12210212120103.

It is not an unprimeable number, because it can be changed into a prime (12210212120129) 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 31 ways as a sum of consecutive naturals, for example, 36695505 + ... + 37026753.

It is an arithmetic number, because the mean of its divisors is an integer number (575977500000).

Almost surely, 2^{12210212120121} is an apocalyptic number.

It is an amenable number.

12210212120121 is a deficient number, since it is larger than the sum of its proper divisors (6221067879879).

12210212120121 is a wasteful number, since it uses less digits than its factorization.

12210212120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357070 (or 357064 counting only the distinct ones).

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

Adding to 12210212120121 its reverse (12102121201221), we get a palindrome (24312333321342).

It can be divided in two parts, 1 and 2210212120121, that added together give a palindrome (2210212120122).

The spelling of 12210212120121 in words is "twelve trillion, two hundred ten billion, two hundred twelve million, one hundred twenty thousand, one hundred twenty-one".