121101983809 has 2 divisors, whose sum is σ = 121101983810. Its totient is φ = 121101983808.

The previous prime is 121101983767. The next prime is 121101983813. The reversal of 121101983809 is 908389101121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120997535409 + 104448400 = 347847^2 + 10220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121101983809 is a prime.

It is not a weakly prime, because it can be changed into another prime (121101183809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60550991904 + 60550991905.

It is an arithmetic number, because the mean of its divisors is an integer number (60550991905).

Almost surely, 2^121101983809 is an apocalyptic number.

It is an amenable number.

121101983809 is a deficient number, since it is larger than the sum of its proper divisors (1).

121101983809 is an equidigital number, since it uses as much as digits as its factorization.

121101983809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 43.

The spelling of 121101983809 in words is "one hundred twenty-one billion, one hundred one million, nine hundred eighty-three thousand, eight hundred nine".