1211223441343 has 2 divisors, whose sum is σ = 1211223441344. Its totient is φ = 1211223441342.

The previous prime is 1211223441331. The next prime is 1211223441353. The reversal of 1211223441343 is 3431443221121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211223441343 - 2²⁵ = 1211189886911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211223441313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605611720671 + 605611720672.

It is an arithmetic number, because the mean of its divisors is an integer number (605611720672).

Almost surely, 2^{1211223441343} is an apocalyptic number.

1211223441343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211223441343 is an equidigital number, since it uses as much as digits as its factorization.

1211223441343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 31.

Adding to 1211223441343 its reverse (3431443221121), we get a palindrome (4642666662464).

The spelling of 1211223441343 in words is "one trillion, two hundred eleven billion, two hundred twenty-three million, four hundred forty-one thousand, three hundred forty-three".