121554107 has 2 divisors, whose sum is σ = 121554108. Its totient is φ = 121554106.

The previous prime is 121554073. The next prime is 121554127. The reversal of 121554107 is 701455121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121554107 - 2²⁶ = 54445243 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121554127) 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, 60777053 + 60777054.

It is an arithmetic number, because the mean of its divisors is an integer number (60777054).

Almost surely, 2^121554107 is an apocalyptic number.

121554107 is a deficient number, since it is larger than the sum of its proper divisors (1).

121554107 is an equidigital number, since it uses as much as digits as its factorization.

121554107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 121554107 is about 11025.1579127013. The cubic root of 121554107 is about 495.3625979778.

The spelling of 121554107 in words is "one hundred twenty-one million, five hundred fifty-four thousand, one hundred seven".