121271009 has 2 divisors, whose sum is σ = 121271010. Its totient is φ = 121271008.

The previous prime is 121270999. The next prime is 121271021. The reversal of 121271009 is 900172121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77088400 + 44182609 = 8780^2 + 6647^2 .

It is a cyclic number.

It is not a de Polignac number, because 121271009 - 2⁴ = 121270993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121271099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60635504 + 60635505.

It is an arithmetic number, because the mean of its divisors is an integer number (60635505).

Almost surely, 2^121271009 is an apocalyptic number.

It is an amenable number.

121271009 is a deficient number, since it is larger than the sum of its proper divisors (1).

121271009 is an equidigital number, since it uses as much as digits as its factorization.

121271009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 121271009 is about 11012.3117010008. The cubic root of 121271009 is about 494.9777346037.

The spelling of 121271009 in words is "one hundred twenty-one million, two hundred seventy-one thousand, nine".