121340081 has 2 divisors, whose sum is σ = 121340082. Its totient is φ = 121340080.

The previous prime is 121340069. The next prime is 121340083. The reversal of 121340081 is 180043121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100180081 + 21160000 = 10009^2 + 4600^2 .

It is an emirp because it is prime and its reverse (180043121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121340081 is a prime.

It is a super-2 number, since 2×121340081² = 29446830514173122, which contains 22 as substring.

Together with 121340083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121340083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60670040 + 60670041.

It is an arithmetic number, because the mean of its divisors is an integer number (60670041).

Almost surely, 2^121340081 is an apocalyptic number.

It is an amenable number.

121340081 is a deficient number, since it is larger than the sum of its proper divisors (1).

121340081 is an equidigital number, since it uses as much as digits as its factorization.

121340081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 121340081 is about 11015.4473808375. The cubic root of 121340081 is about 495.0716911435.

The spelling of 121340081 in words is "one hundred twenty-one million, three hundred forty thousand, eighty-one".