1222334567778 has 16 divisors (see below), whose sum is σ = 2447924363136. Its totient is φ = 406902318000.

The previous prime is 1222334567759. The next prime is 1222334567789. The reversal of 1222334567778 is 8777654332221.

It is a happy number.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135629601 + ... + 135638612.

It is an arithmetic number, because the mean of its divisors is an integer number (152995272696).

Almost surely, 2^{1222334567778} is an apocalyptic number.

1222334567778 is an abundant number, since it is smaller than the sum of its proper divisors (1225589795358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222334567778 is a wasteful number, since it uses less digits than its factorization.

1222334567778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271268969.

The product of its digits is 23708160, while the sum is 57.

Adding to 1222334567778 its reverse (8777654332221), we get a palindrome (9999988899999).

The spelling of 1222334567778 in words is "one trillion, two hundred twenty-two billion, three hundred thirty-four million, five hundred sixty-seven thousand, seven hundred seventy-eight".