121506379 has 2 divisors, whose sum is σ = 121506380. Its totient is φ = 121506378.

The previous prime is 121506337. The next prime is 121506389. The reversal of 121506379 is 973605121.

It is a strong prime.

It is an emirp because it is prime and its reverse (973605121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121506379 - 2²⁵ = 87951947 is a prime.

It is not a weakly prime, because it can be changed into another prime (121506389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60753189 + 60753190.

It is an arithmetic number, because the mean of its divisors is an integer number (60753190).

Almost surely, 2^121506379 is an apocalyptic number.

121506379 is a deficient number, since it is larger than the sum of its proper divisors (1).

121506379 is an equidigital number, since it uses as much as digits as its factorization.

121506379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 121506379 is about 11022.9931960425. The cubic root of 121506379 is about 495.2977550812.

The spelling of 121506379 in words is "one hundred twenty-one million, five hundred six thousand, three hundred seventy-nine".