12021202112121 has 24 divisors (see below), whose sum is σ = 17671337218080. Its totient is φ = 7873346529216.

The previous prime is 12021202112111. The next prime is 12021202112141. The reversal of 12021202112121 is 12121120212021.

12021202112121 is a `hidden beast` number, since 120 + 2 + 120 + 211 + 212 + 1 = 666.

It is not a de Polignac number, because 12021202112121 - 2¹⁹ = 12021201587833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12021202112094 and 12021202112103.

It is not an unprimeable number, because it can be changed into a prime (12021202112111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44817796 + ... + 45085221.

It is an arithmetic number, because the mean of its divisors is an integer number (736305717420).

Almost surely, 2^{12021202112121} is an apocalyptic number.

It is an amenable number.

12021202112121 is a deficient number, since it is larger than the sum of its proper divisors (5650135105959).

12021202112121 is a wasteful number, since it uses less digits than its factorization.

12021202112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89903285 (or 89903282 counting only the distinct ones).

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

Adding to 12021202112121 its reverse (12121120212021), we get a palindrome (24142322324142).

The spelling of 12021202112121 in words is "twelve trillion, twenty-one billion, two hundred two million, one hundred twelve thousand, one hundred twenty-one".