121142134221209 has 2 divisors, whose sum is σ = 121142134221210. Its totient is φ = 121142134221208.

The previous prime is 121142134221203. The next prime is 121142134221271. The reversal of 121142134221209 is 902122431241121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61305721061209 + 59836413160000 = 7829797^2 + 7735400^2 .

It is a cyclic number.

It is not a de Polignac number, because 121142134221209 - 2⁴ = 121142134221193 is a prime.

It is a super-3 number, since 3×121142134221209³ (a number of 43 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (121142134221203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60571067110604 + 60571067110605.

It is an arithmetic number, because the mean of its divisors is an integer number (60571067110605).

Almost surely, 2^{121142134221209} is an apocalyptic number.

It is an amenable number.

121142134221209 is a deficient number, since it is larger than the sum of its proper divisors (1).

121142134221209 is an equidigital number, since it uses as much as digits as its factorization.

121142134221209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 35.

The spelling of 121142134221209 in words is "one hundred twenty-one trillion, one hundred forty-two billion, one hundred thirty-four million, two hundred twenty-one thousand, two hundred nine".