121145879 has 2 divisors, whose sum is σ = 121145880. Its totient is φ = 121145878.

The previous prime is 121145851. The next prime is 121145897. The reversal of 121145879 is 978541121.

Together with next prime (121145897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121145879 - 2²⁰ = 120097303 is a prime.

It is a super-3 number, since 3×121145879³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121145839) 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, 60572939 + 60572940.

It is an arithmetic number, because the mean of its divisors is an integer number (60572940).

Almost surely, 2^121145879 is an apocalyptic number.

121145879 is a deficient number, since it is larger than the sum of its proper divisors (1).

121145879 is an equidigital number, since it uses as much as digits as its factorization.

121145879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 38.

The square root of 121145879 is about 11006.6288662787. The cubic root of 121145879 is about 494.8074331740.

The spelling of 121145879 in words is "one hundred twenty-one million, one hundred forty-five thousand, eight hundred seventy-nine".