121200017 has 2 divisors, whose sum is σ = 121200018. Its totient is φ = 121200016.

The previous prime is 121200011. The next prime is 121200047. The reversal of 121200017 is 710002121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121198081 + 1936 = 11009^2 + 44^2 .

It is an emirp because it is prime and its reverse (710002121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121200017 - 2²⁶ = 54091153 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 121199974 and 121200010.

It is not a weakly prime, because it can be changed into another prime (121200011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600008 + 60600009.

It is an arithmetic number, because the mean of its divisors is an integer number (60600009).

Almost surely, 2^121200017 is an apocalyptic number.

It is an amenable number.

121200017 is a deficient number, since it is larger than the sum of its proper divisors (1).

121200017 is an equidigital number, since it uses as much as digits as its factorization.

121200017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 121200017 is about 11009.0879277077. The cubic root of 121200017 is about 494.8811291613.

Adding to 121200017 its reverse (710002121), we get a palindrome (831202138).

The spelling of 121200017 in words is "one hundred twenty-one million, two hundred thousand, seventeen".