1121776681 has 2 divisors, whose sum is σ = 1121776682. Its totient is φ = 1121776680.

The previous prime is 1121776673. The next prime is 1121776697. The reversal of 1121776681 is 1866771211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1121647081 + 129600 = 33491^2 + 360^2 .

It is an emirp because it is prime and its reverse (1866771211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121776681 - 2³ = 1121776673 is a prime.

It is a super-2 number, since 2×1121776681² = 2516765844070751522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1121776081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560888340 + 560888341.

It is an arithmetic number, because the mean of its divisors is an integer number (560888341).

Almost surely, 2^1121776681 is an apocalyptic number.

It is an amenable number.

1121776681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121776681 is an equidigital number, since it uses as much as digits as its factorization.

1121776681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 40.

The square root of 1121776681 is about 33492.9347922812. The cubic root of 1121776681 is about 1039.0476615460.

The spelling of 1121776681 in words is "one billion, one hundred twenty-one million, seven hundred seventy-six thousand, six hundred eighty-one".