12221012021201 has 4 divisors (see below), whose sum is σ = 12240948419892. Its totient is φ = 12201075622512.

The previous prime is 12221012021191. The next prime is 12221012021269. The reversal of 12221012021201 is 10212021012221.

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 1288724448400 + 10932287572801 = 1135220^2 + 3306401^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221012021201 - 2²² = 12221007826897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12221012021201.

It is not an unprimeable number, because it can be changed into a prime (12221012021501) 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, 9968198426 + ... + 9968199651.

It is an arithmetic number, because the mean of its divisors is an integer number (3060237104973).

Almost surely, 2^{12221012021201} is an apocalyptic number.

It is an amenable number.

12221012021201 is a deficient number, since it is larger than the sum of its proper divisors (19936398691).

12221012021201 is an equidigital number, since it uses as much as digits as its factorization.

12221012021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19936398690.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12221012021201 its reverse (10212021012221), we get a palindrome (22433033033422).

The spelling of 12221012021201 in words is "twelve trillion, two hundred twenty-one billion, twelve million, twenty-one thousand, two hundred one".