1000122161 has 2 divisors, whose sum is σ = 1000122162. Its totient is φ = 1000122160.

The previous prime is 1000122091. The next prime is 1000122191. The reversal of 1000122161 is 1612210001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 997296400 + 2825761 = 31580^2 + 1681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000122161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000122191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500061080 + 500061081.

It is an arithmetic number, because the mean of its divisors is an integer number (500061081).

Almost surely, 2^1000122161 is an apocalyptic number.

It is an amenable number.

1000122161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000122161 is an equidigital number, since it uses as much as digits as its factorization.

1000122161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1000122161 is about 31624.7080777041. The cubic root of 1000122161 is about 1000.0407186753.

Adding to 1000122161 its reverse (1612210001), we get a palindrome (2612332162).

The spelling of 1000122161 in words is "one billion, one hundred twenty-two thousand, one hundred sixty-one".