12011221566122 has 48 divisors (see below), whose sum is σ = 20223918639360. Its totient is φ = 5338147406592.

The previous prime is 12011221566101. The next prime is 12011221566131. The reversal of 12011221566122 is 22166512211021.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4668173 + ... + 6768624.

It is an arithmetic number, because the mean of its divisors is an integer number (421331638320).

Almost surely, 2^{12011221566122} is an apocalyptic number.

12011221566122 is a deficient number, since it is larger than the sum of its proper divisors (8212697073238).

12011221566122 is a wasteful number, since it uses less digits than its factorization.

12011221566122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11436935 (or 11436918 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

Adding to 12011221566122 its reverse (22166512211021), we get a palindrome (34177733777143).

The spelling of 12011221566122 in words is "twelve trillion, eleven billion, two hundred twenty-one million, five hundred sixty-six thousand, one hundred twenty-two".