12012221321201 has 4 divisors (see below), whose sum is σ = 12012258172404. Its totient is φ = 12012184470000.

The previous prime is 12012221321189. The next prime is 12012221321249. The reversal of 12012221321201 is 10212312221021.

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 856781640625 + 11155439680576 = 925625^2 + 3339976^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12012221321201 is a prime.

It is a super-2 number, since 2×12012221321201² (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 (12012221321291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17932250 + ... + 18590051.

It is an arithmetic number, because the mean of its divisors is an integer number (3003064543101).

Almost surely, 2^{12012221321201} is an apocalyptic number.

It is an amenable number.

12012221321201 is a deficient number, since it is larger than the sum of its proper divisors (36851203).

12012221321201 is an equidigital number, since it uses as much as digits as its factorization.

12012221321201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36851202.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 12012221321201 its reverse (10212312221021), we get a palindrome (22224533542222).

The spelling of 12012221321201 in words is "twelve trillion, twelve billion, two hundred twenty-one million, three hundred twenty-one thousand, two hundred one".