121078291 has 2 divisors, whose sum is σ = 121078292. Its totient is φ = 121078290.

The previous prime is 121078283. The next prime is 121078297. The reversal of 121078291 is 192870121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121078291 - 2³ = 121078283 is a prime.

It is not a weakly prime, because it can be changed into another prime (121078297) 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, 60539145 + 60539146.

It is an arithmetic number, because the mean of its divisors is an integer number (60539146).

Almost surely, 2^121078291 is an apocalyptic number.

121078291 is a deficient number, since it is larger than the sum of its proper divisors (1).

121078291 is an equidigital number, since it uses as much as digits as its factorization.

121078291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 121078291 is about 11003.5581063581. The cubic root of 121078291 is about 494.7153973949.

The spelling of 121078291 in words is "one hundred twenty-one million, seventy-eight thousand, two hundred ninety-one".