121240087 has 2 divisors, whose sum is σ = 121240088. Its totient is φ = 121240086.

The previous prime is 121240081. The next prime is 121240099. The reversal of 121240087 is 780042121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121240087 - 2¹⁵ = 121207319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121240081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60620043 + 60620044.

It is an arithmetic number, because the mean of its divisors is an integer number (60620044).

Almost surely, 2^121240087 is an apocalyptic number.

121240087 is a deficient number, since it is larger than the sum of its proper divisors (1).

121240087 is an equidigital number, since it uses as much as digits as its factorization.

121240087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 121240087 is about 11010.9076374294. The cubic root of 121240087 is about 494.9356607871.

The spelling of 121240087 in words is "one hundred twenty-one million, two hundred forty thousand, eighty-seven".