1122225778 has 4 divisors (see below), whose sum is σ = 1683338670. Its totient is φ = 561112888.

The previous prime is 1122225757. The next prime is 1122225791. The reversal of 1122225778 is 8775222211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8775222211 = 7 ⋅1253603173.

It can be written as a sum of positive squares in only one way, i.e., 1111355569 + 10870209 = 33337^2 + 3297^2 .

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280556443 + ... + 280556446.

Almost surely, 2^1122225778 is an apocalyptic number.

1122225778 is a deficient number, since it is larger than the sum of its proper divisors (561112892).

1122225778 is an equidigital number, since it uses as much as digits as its factorization.

1122225778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561112891.

The product of its digits is 31360, while the sum is 37.

The square root of 1122225778 is about 33499.6384756612. The cubic root of 1122225778 is about 1039.1863020134.

Adding to 1122225778 its reverse (8775222211), we get a palindrome (9897447989).

The spelling of 1122225778 in words is "one billion, one hundred twenty-two million, two hundred twenty-five thousand, seven hundred seventy-eight".