12221210221201 has 4 divisors (see below), whose sum is σ = 12264702072804. Its totient is φ = 12177718369600.

The previous prime is 12221210221177. The next prime is 12221210221237. The reversal of 12221210221201 is 10212201212221.

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 6904491969600 + 5316718251601 = 2627640^2 + 2305801^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221210221201 - 2¹⁵ = 12221210188433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221210221301) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 21745925380 + ... + 21745925941.

It is an arithmetic number, because the mean of its divisors is an integer number (3066175518201).

Almost surely, 2^{12221210221201} is an apocalyptic number.

It is an amenable number.

12221210221201 is a deficient number, since it is larger than the sum of its proper divisors (43491851603).

12221210221201 is an equidigital number, since it uses as much as digits as its factorization.

12221210221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43491851602.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12221210221201 its reverse (10212201212221), we get a palindrome (22433411433422).

The spelling of 12221210221201 in words is "twelve trillion, two hundred twenty-one billion, two hundred ten million, two hundred twenty-one thousand, two hundred one".