121751879 has 2 divisors, whose sum is σ = 121751880. Its totient is φ = 121751878.

The previous prime is 121751873. The next prime is 121751887. The reversal of 121751879 is 978157121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121751879 - 2⁴ = 121751863 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121751873) 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, 60875939 + 60875940.

It is an arithmetic number, because the mean of its divisors is an integer number (60875940).

Almost surely, 2^121751879 is an apocalyptic number.

121751879 is a deficient number, since it is larger than the sum of its proper divisors (1).

121751879 is an equidigital number, since it uses as much as digits as its factorization.

121751879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 41.

The square root of 121751879 is about 11034.1233906459. The cubic root of 121751879 is about 495.6311087654.

The spelling of 121751879 in words is "one hundred twenty-one million, seven hundred fifty-one thousand, eight hundred seventy-nine".