12211021021229 has 2 divisors, whose sum is σ = 12211021021230. Its totient is φ = 12211021021228.

The previous prime is 12211021021187. The next prime is 12211021021261. The reversal of 12211021021229 is 92212012011221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11038939800100 + 1172081221129 = 3322490^2 + 1082627^2 .

It is an emirp because it is prime and its reverse (92212012011221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12211021021229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12211021021198 and 12211021021207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12211021024229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105510510614 + 6105510510615.

It is an arithmetic number, because the mean of its divisors is an integer number (6105510510615).

Almost surely, 2^{12211021021229} is an apocalyptic number.

It is an amenable number.

12211021021229 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211021021229 is an equidigital number, since it uses as much as digits as its factorization.

12211021021229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 12211021021229 in words is "twelve trillion, two hundred eleven billion, twenty-one million, twenty-one thousand, two hundred twenty-nine".