12221212112001 has 24 divisors (see below), whose sum is σ = 18246359152320. Its totient is φ = 7878080584800.

The previous prime is 12221212111951. The next prime is 12221212112003. The reversal of 12221212112001 is 10021121212221.

12221212112001 is a `hidden beast` number, since 12 + 221 + 21 + 211 + 200 + 1 = 666.

It is not a de Polignac number, because 12221212112001 - 2⁷ = 12221212111873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12221212112003) by changing a digit.

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, 188618965 + ... + 188683746.

It is an arithmetic number, because the mean of its divisors is an integer number (760264964680).

Almost surely, 2^{12221212112001} is an apocalyptic number.

It is an amenable number.

12221212112001 is a deficient number, since it is larger than the sum of its proper divisors (6025147040319).

12221212112001 is a wasteful number, since it uses less digits than its factorization.

12221212112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377302837 (or 377302834 counting only the distinct ones).

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

Adding to 12221212112001 its reverse (10021121212221), we get a palindrome (22242333324222).

The spelling of 12221212112001 in words is "twelve trillion, two hundred twenty-one billion, two hundred twelve million, one hundred twelve thousand, one".