1112223781 has 2 divisors, whose sum is σ = 1112223782. Its totient is φ = 1112223780.

The previous prime is 1112223757. The next prime is 1112223877. The reversal of 1112223781 is 1873222111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1090980900 + 21242881 = 33030^2 + 4609^2 .

It is an emirp because it is prime and its reverse (1873222111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1112223781 - 2²⁷ = 978006053 is a prime.

It is a super-2 number, since 2×1112223781² = 2474083478043871922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1112224781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556111890 + 556111891.

It is an arithmetic number, because the mean of its divisors is an integer number (556111891).

Almost surely, 2^1112223781 is an apocalyptic number.

It is an amenable number.

1112223781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112223781 is an equidigital number, since it uses as much as digits as its factorization.

1112223781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 28.

The square root of 1112223781 is about 33350.0192053918. The cubic root of 1112223781 is about 1036.0897857144.

Adding to 1112223781 its reverse (1873222111), we get a palindrome (2985445892).

The spelling of 1112223781 in words is "one billion, one hundred twelve million, two hundred twenty-three thousand, seven hundred eighty-one".