12211243121111 has 2 divisors, whose sum is σ = 12211243121112. Its totient is φ = 12211243121110.

The previous prime is 12211243121089. The next prime is 12211243121123. The reversal of 12211243121111 is 11112134211221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12211243121111 - 2⁶ = 12211243121047 is a prime.

It is a super-2 number, since 2×12211243121111² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12211243121411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105621560555 + 6105621560556.

It is an arithmetic number, because the mean of its divisors is an integer number (6105621560556).

Almost surely, 2^{12211243121111} is an apocalyptic number.

12211243121111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211243121111 is an equidigital number, since it uses as much as digits as its factorization.

12211243121111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192, while the sum is 23.

Adding to 12211243121111 its reverse (11112134211221), we get a palindrome (23323377332332).

The spelling of 12211243121111 in words is "twelve trillion, two hundred eleven billion, two hundred forty-three million, one hundred twenty-one thousand, one hundred eleven".