1221222168443 has 2 divisors, whose sum is σ = 1221222168444. Its totient is φ = 1221222168442.

The previous prime is 1221222168409. The next prime is 1221222168497. The reversal of 1221222168443 is 3448612221221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221222168443 - 2¹⁰ = 1221222167419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221222168397 and 1221222168406.

It is not a weakly prime, because it can be changed into another prime (1221222168403) 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, 610611084221 + 610611084222.

It is an arithmetic number, because the mean of its divisors is an integer number (610611084222).

Almost surely, 2^{1221222168443} is an apocalyptic number.

1221222168443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221222168443 is an equidigital number, since it uses as much as digits as its factorization.

1221222168443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73728, while the sum is 38.

Adding to 1221222168443 its reverse (3448612221221), we get a palindrome (4669834389664).

The spelling of 1221222168443 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-two million, one hundred sixty-eight thousand, four hundred forty-three".