1222223345566 has 4 divisors (see below), whose sum is σ = 1833335018352. Its totient is φ = 611111672782.

The previous prime is 1222223345489. The next prime is 1222223345599. The reversal of 1222223345566 is 6655433222221.

It is a semiprime because it is the product of two primes.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305555836390 + ... + 305555836393.

It is an arithmetic number, because the mean of its divisors is an integer number (458333754588).

Almost surely, 2^{1222223345566} is an apocalyptic number.

1222223345566 is a deficient number, since it is larger than the sum of its proper divisors (611111672786).

1222223345566 is an equidigital number, since it uses as much as digits as its factorization.

1222223345566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611111672785.

The product of its digits is 1036800, while the sum is 43.

Adding to 1222223345566 its reverse (6655433222221), we get a palindrome (7877656567787).

The spelling of 1222223345566 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-three million, three hundred forty-five thousand, five hundred sixty-six".