12211112221201 has 4 divisors (see below), whose sum is σ = 12216762900004. Its totient is φ = 12205461542400.

The previous prime is 12211112221193. The next prime is 12211112221207. The reversal of 12211112221201 is 10212221111221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6618265614801 + 5592846606400 = 2572599^2 + 2364920^2 .

It is a cyclic number.

It is not a de Polignac number, because 12211112221201 - 2³ = 12211112221193 is a prime.

It is a super-2 number, since 2×12211112221201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12211112221207) 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 3 ways as a sum of consecutive naturals, for example, 2825336160 + ... + 2825340481.

It is an arithmetic number, because the mean of its divisors is an integer number (3054190725001).

Almost surely, 2^{12211112221201} is an apocalyptic number.

It is an amenable number.

12211112221201 is a deficient number, since it is larger than the sum of its proper divisors (5650678803).

12211112221201 is an equidigital number, since it uses as much as digits as its factorization.

12211112221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5650678802.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12211112221201 its reverse (10212221111221), we get a palindrome (22423333332422).

The spelling of 12211112221201 in words is "twelve trillion, two hundred eleven billion, one hundred twelve million, two hundred twenty-one thousand, two hundred one".