121380397 has 2 divisors, whose sum is σ = 121380398. Its totient is φ = 121380396.

The previous prime is 121380331. The next prime is 121380403. The reversal of 121380397 is 793083121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93141801 + 28238596 = 9651^2 + 5314^2 .

It is an emirp because it is prime and its reverse (793083121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121380397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121380197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60690198 + 60690199.

It is an arithmetic number, because the mean of its divisors is an integer number (60690199).

Almost surely, 2^121380397 is an apocalyptic number.

It is an amenable number.

121380397 is a deficient number, since it is larger than the sum of its proper divisors (1).

121380397 is an equidigital number, since it uses as much as digits as its factorization.

121380397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 121380397 is about 11017.2772044639. The cubic root of 121380397 is about 495.1265152928.

The spelling of 121380397 in words is "one hundred twenty-one million, three hundred eighty thousand, three hundred ninety-seven".