1120078021 has 2 divisors, whose sum is σ = 1120078022. Its totient is φ = 1120078020.

The previous prime is 1120078013. The next prime is 1120078039. The reversal of 1120078021 is 1208700211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 568297921 + 551780100 = 23839^2 + 23490^2 .

It is an emirp because it is prime and its reverse (1208700211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1120078021 - 2³ = 1120078013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1120077983 and 1120078001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1120078121) 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, 560039010 + 560039011.

It is an arithmetic number, because the mean of its divisors is an integer number (560039011).

Almost surely, 2^1120078021 is an apocalyptic number.

It is an amenable number.

1120078021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1120078021 is an equidigital number, since it uses as much as digits as its factorization.

1120078021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 1120078021 is about 33467.5667027049. The cubic root of 1120078021 is about 1038.5229343092.

Adding to 1120078021 its reverse (1208700211), we get a palindrome (2328778232).

The spelling of 1120078021 in words is "one billion, one hundred twenty million, seventy-eight thousand, twenty-one".