1222233567778 has 8 divisors (see below), whose sum is σ = 1858464740268. Its totient is φ = 602745321024.

The previous prime is 1222233567761. The next prime is 1222233567787. The reversal of 1222233567778 is 8777653322221.

It can be written as a sum of positive squares in 2 ways, for example, as 1186001587369 + 36231980409 = 1089037^2 + 190347^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4185731251 + ... + 4185731542.

Almost surely, 2^{1222233567778} is an apocalyptic number.

1222233567778 is a deficient number, since it is larger than the sum of its proper divisors (636231172490).

1222233567778 is an equidigital number, since it uses as much as digits as its factorization.

1222233567778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8371462868.

The product of its digits is 11854080, while the sum is 55.

Adding to 1222233567778 its reverse (8777653322221), we get a palindrome (9999886889999).

The spelling of 1222233567778 in words is "one trillion, two hundred twenty-two billion, two hundred thirty-three million, five hundred sixty-seven thousand, seven hundred seventy-eight".