120121013 has 2 divisors, whose sum is σ = 120121014. Its totient is φ = 120121012.

The previous prime is 120121009. The next prime is 120121033. The reversal of 120121013 is 310121021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118222129 + 1898884 = 10873^2 + 1378^2 .

It is a cyclic number.

It is not a de Polignac number, because 120121013 - 2² = 120121009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 120120985 and 120121003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120121033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60060506 + 60060507.

It is an arithmetic number, because the mean of its divisors is an integer number (60060507).

Almost surely, 2^120121013 is an apocalyptic number.

It is an amenable number.

120121013 is a deficient number, since it is larger than the sum of its proper divisors (1).

120121013 is an equidigital number, since it uses as much as digits as its factorization.

120121013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 120121013 is about 10959.9732207702. The cubic root of 120121013 is about 493.4081612310.

Adding to 120121013 its reverse (310121021), we get a palindrome (430242034).

The spelling of 120121013 in words is "one hundred twenty million, one hundred twenty-one thousand, thirteen".