12011212210122 has 64 divisors (see below), whose sum is σ = 27268109256960. Its totient is φ = 3917663485632.

The previous prime is 12011212210103. The next prime is 12011212210133. The reversal of 12011212210122 is 22101221211021.

12011212210122 is a `hidden beast` number, since 1 + 201 + 121 + 221 + 0 + 122 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12011212210095 and 12011212210104.

It is an unprimeable number.

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, 4558198 + ... + 6693249.

It is an arithmetic number, because the mean of its divisors is an integer number (426064207140).

Almost surely, 2^{12011212210122} is an apocalyptic number.

12011212210122 is an abundant number, since it is smaller than the sum of its proper divisors (15256897046838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12011212210122 is a wasteful number, since it uses less digits than its factorization.

12011212210122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11251884 (or 11251878 counting only the distinct ones).

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

Adding to 12011212210122 its reverse (22101221211021), we get a palindrome (34112433421143).

The spelling of 12011212210122 in words is "twelve trillion, eleven billion, two hundred twelve million, two hundred ten thousand, one hundred twenty-two".