12021120120221 has 2 divisors, whose sum is σ = 12021120120222. Its totient is φ = 12021120120220.

The previous prime is 12021120120211. The next prime is 12021120120227. The reversal of 12021120120221 is 12202102112021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7074610514596 + 4946509605625 = 2659814^2 + 2224075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12021120120221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12021120120221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12021120120227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010560060110 + 6010560060111.

It is an arithmetic number, because the mean of its divisors is an integer number (6010560060111).

Almost surely, 2^{12021120120221} is an apocalyptic number.

It is an amenable number.

12021120120221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021120120221 is an equidigital number, since it uses as much as digits as its factorization.

12021120120221 is an evil number, because the sum of its binary digits is even.

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

Adding to 12021120120221 its reverse (12202102112021), we get a palindrome (24223222232242).

The spelling of 12021120120221 in words is "twelve trillion, twenty-one billion, one hundred twenty million, one hundred twenty thousand, two hundred twenty-one".