121270394209 has 2 divisors, whose sum is σ = 121270394210. Its totient is φ = 121270394208.

The previous prime is 121270394171. The next prime is 121270394233. The reversal of 121270394209 is 902493072121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120376384209 + 894010000 = 346953^2 + 29900^2 .

It is an emirp because it is prime and its reverse (902493072121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121270394209 - 2⁹ = 121270393697 is a prime.

It is not a weakly prime, because it can be changed into another prime (121270394269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60635197104 + 60635197105.

It is an arithmetic number, because the mean of its divisors is an integer number (60635197105).

Almost surely, 2^121270394209 is an apocalyptic number.

It is an amenable number.

121270394209 is a deficient number, since it is larger than the sum of its proper divisors (1).

121270394209 is an equidigital number, since it uses as much as digits as its factorization.

121270394209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 121270394209 in words is "one hundred twenty-one billion, two hundred seventy million, three hundred ninety-four thousand, two hundred nine".