120121 has 2 divisors, whose sum is σ = 120122. Its totient is φ = 120120.

The previous prime is 120103. The next prime is 120157. The reversal of 120121 is 121021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112896 + 7225 = 336^2 + 85^2 .

It is an emirp because it is prime and its reverse (121021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120121 - 2⁷ = 119993 is a prime.

It is not a weakly prime, because it can be changed into another prime (120181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60060 + 60061.

It is an arithmetic number, because the mean of its divisors is an integer number (60061).

2¹²⁰¹²¹ is an apocalyptic number.

It is an amenable number.

120121 is a deficient number, since it is larger than the sum of its proper divisors (1).

120121 is an equidigital number, since it uses as much as digits as its factorization.

120121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 120121 is about 346.5847659664. The cubic root of 120121 is about 49.3408143431.

Adding to 120121 its reverse (121021), we get a palindrome (241142).

Subtracting 120121 from its reverse (121021), we obtain a square (900 = 30²).

The spelling of 120121 in words is "one hundred twenty thousand, one hundred twenty-one", and thus it is an iban number.