12212021011121 has 2 divisors, whose sum is σ = 12212021011122. Its totient is φ = 12212021011120.

The previous prime is 12212021011111. The next prime is 12212021011163. The reversal of 12212021011121 is 12111012021221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9334790873521 + 2877230137600 = 3055289^2 + 1696240^2 .

It is an emirp because it is prime and its reverse (12111012021221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12212021011121 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 12212021011121.

It is not a weakly prime, because it can be changed into another prime (12212021011111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106010505560 + 6106010505561.

It is an arithmetic number, because the mean of its divisors is an integer number (6106010505561).

Almost surely, 2^{12212021011121} is an apocalyptic number.

It is an amenable number.

12212021011121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212021011121 is an equidigital number, since it uses as much as digits as its factorization.

12212021011121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12212021011121 its reverse (12111012021221), we get a palindrome (24323033032342).

The spelling of 12212021011121 in words is "twelve trillion, two hundred twelve billion, twenty-one million, eleven thousand, one hundred twenty-one".