1112213681 has 2 divisors, whose sum is σ = 1112213682. Its totient is φ = 1112213680.

The previous prime is 1112213677. The next prime is 1112213689. The reversal of 1112213681 is 1863122111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1107824656 + 4389025 = 33284^2 + 2095^2 .

It is a cyclic number.

It is not a de Polignac number, because 1112213681 - 2² = 1112213677 is a prime.

It is a super-2 number, since 2×1112213681² = 2474038544407139522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1112213681.

It is not a weakly prime, because it can be changed into another prime (1112213689) 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, 556106840 + 556106841.

It is an arithmetic number, because the mean of its divisors is an integer number (556106841).

Almost surely, 2^1112213681 is an apocalyptic number.

It is an amenable number.

1112213681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112213681 is an equidigital number, since it uses as much as digits as its factorization.

1112213681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 26.

The square root of 1112213681 is about 33349.8677808473. The cubic root of 1112213681 is about 1036.0866494934.

Adding to 1112213681 its reverse (1863122111), we get a palindrome (2975335792).

The spelling of 1112213681 in words is "one billion, one hundred twelve million, two hundred thirteen thousand, six hundred eighty-one".