12021002120221 has 2 divisors, whose sum is σ = 12021002120222. Its totient is φ = 12021002120220.

The previous prime is 12021002120219. The next prime is 12021002120251. The reversal of 12021002120221 is 12202120012021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6558900271225 + 5462101848996 = 2561035^2 + 2337114^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021002120221 - 2¹ = 12021002120219 is a prime.

Together with 12021002120219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 12021002120195 and 12021002120204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12021002120251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010501060110 + 6010501060111.

It is an arithmetic number, because the mean of its divisors is an integer number (6010501060111).

Almost surely, 2^{12021002120221} is an apocalyptic number.

It is an amenable number.

12021002120221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021002120221 is an equidigital number, since it uses as much as digits as its factorization.

12021002120221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12021002120221 its reverse (12202120012021), we get a palindrome (24223122132242).

The spelling of 12021002120221 in words is "twelve trillion, twenty-one billion, two million, one hundred twenty thousand, two hundred twenty-one".