121120010091809 has 2 divisors, whose sum is σ = 121120010091810. Its totient is φ = 121120010091808.

The previous prime is 121120010091767. The next prime is 121120010091823. The reversal of 121120010091809 is 908190010021121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118898240978209 + 2221769113600 = 10904047^2 + 1490560^2 .

It is a cyclic number.

It is not a de Polignac number, because 121120010091809 - 2²⁰ = 121120009043233 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (121120010091109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60560005045904 + 60560005045905.

It is an arithmetic number, because the mean of its divisors is an integer number (60560005045905).

Almost surely, 2^{121120010091809} is an apocalyptic number.

It is an amenable number.

121120010091809 is a deficient number, since it is larger than the sum of its proper divisors (1).

121120010091809 is an equidigital number, since it uses as much as digits as its factorization.

121120010091809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 35.

The spelling of 121120010091809 in words is "one hundred twenty-one trillion, one hundred twenty billion, ten million, ninety-one thousand, eight hundred nine".