1000121 has 2 divisors, whose sum is σ = 1000122. Its totient is φ = 1000120.

The previous prime is 1000117. The next prime is 1000133. The reversal of 1000121 is 1210001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1000000 + 121 = 1000^2 + 11^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000121 - 2² = 1000117 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1000151) 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, 500060 + 500061.

It is an arithmetic number, because the mean of its divisors is an integer number (500061).

2^1000121 is an apocalyptic number.

It is an amenable number.

1000121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000121 is an equidigital number, since it uses as much as digits as its factorization.

1000121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 1000121 is about 1000.0604981700. The cubic root of 1000121 is about 100.0040331707.

Adding to 1000121 its reverse (1210001), we get a palindrome (2210122).

Multiplying 1000121 by its reverse (1210001), we get a palindrome (1210147410121).

The spelling of 1000121 in words is "one million, one hundred twenty-one", and thus it is an aban number.