822499121 has 2 divisors, whose sum is σ = 822499122. Its totient is φ = 822499120.

The previous prime is 822499081. The next prime is 822499127. The reversal of 822499121 is 121994228.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 821624896 + 874225 = 28664^2 + 935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-822499121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (822499127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411249560 + 411249561.

It is an arithmetic number, because the mean of its divisors is an integer number (411249561).

Almost surely, 2^822499121 is an apocalyptic number.

It is an amenable number.

822499121 is a deficient number, since it is larger than the sum of its proper divisors (1).

822499121 is an equidigital number, since it uses as much as digits as its factorization.

822499121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 38.

The square root of 822499121 is about 28679.2454747331. The cubic root of 822499121 is about 936.9400730190.

The spelling of 822499121 in words is "eight hundred twenty-two million, four hundred ninety-nine thousand, one hundred twenty-one".