121000121120009 has 2 divisors, whose sum is σ = 121000121120010. Its totient is φ = 121000121120008.

The previous prime is 121000121120003. The next prime is 121000121120017. The reversal of 121000121120009 is 900021121000121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65652175375609 + 55347945744400 = 8102603^2 + 7439620^2 .

It is a cyclic number.

It is not a de Polignac number, because 121000121120009 - 2³² = 120995826152713 is a prime.

It is a super-2 number, since 2×121000121120009² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121000121120003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500060560004 + 60500060560005.

It is an arithmetic number, because the mean of its divisors is an integer number (60500060560005).

Almost surely, 2^{121000121120009} is an apocalyptic number.

It is an amenable number.

121000121120009 is a deficient number, since it is larger than the sum of its proper divisors (1).

121000121120009 is an equidigital number, since it uses as much as digits as its factorization.

121000121120009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 121000121120009 in words is "one hundred twenty-one trillion, one hundred twenty-one million, one hundred twenty thousand, nine".