121013311009 has 2 divisors, whose sum is σ = 121013311010. Its totient is φ = 121013311008.

The previous prime is 121013310919. The next prime is 121013311033. The reversal of 121013311009 is 900113310121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120200890000 + 812421009 = 346700^2 + 28503^2 .

It is an emirp because it is prime and its reverse (900113310121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121013311009 - 2²⁷ = 120879093281 is a prime.

It is not a weakly prime, because it can be changed into another prime (121013311079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60506655504 + 60506655505.

It is an arithmetic number, because the mean of its divisors is an integer number (60506655505).

Almost surely, 2^121013311009 is an apocalyptic number.

It is an amenable number.

121013311009 is a deficient number, since it is larger than the sum of its proper divisors (1).

121013311009 is an equidigital number, since it uses as much as digits as its factorization.

121013311009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 22.

The spelling of 121013311009 in words is "one hundred twenty-one billion, thirteen million, three hundred eleven thousand, nine".