1123056824821 has 2 divisors, whose sum is σ = 1123056824822. Its totient is φ = 1123056824820.

The previous prime is 1123056824807. The next prime is 1123056824837. The reversal of 1123056824821 is 1284286503211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 569202347025 + 553854477796 = 754455^2 + 744214^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123056824821 - 2¹⁹ = 1123056300533 is a prime.

It is a super-2 number, since 2×1123056824821² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123056824521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561528412410 + 561528412411.

It is an arithmetic number, because the mean of its divisors is an integer number (561528412411).

Almost surely, 2^{1123056824821} is an apocalyptic number.

It is an amenable number.

1123056824821 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123056824821 is an equidigital number, since it uses as much as digits as its factorization.

1123056824821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 184320, while the sum is 43.

The spelling of 1123056824821 in words is "one trillion, one hundred twenty-three billion, fifty-six million, eight hundred twenty-four thousand, eight hundred twenty-one".