121518107 has 2 divisors, whose sum is σ = 121518108. Its totient is φ = 121518106.

The previous prime is 121518097. The next prime is 121518119. The reversal of 121518107 is 701815121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121518107 - 2¹⁰ = 121517083 is a prime.

It is not a weakly prime, because it can be changed into another prime (121517107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60759053 + 60759054.

It is an arithmetic number, because the mean of its divisors is an integer number (60759054).

Almost surely, 2^121518107 is an apocalyptic number.

121518107 is a deficient number, since it is larger than the sum of its proper divisors (1).

121518107 is an equidigital number, since it uses as much as digits as its factorization.

121518107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 26.

The square root of 121518107 is about 11023.5251621249. The cubic root of 121518107 is about 495.3136902259.

The spelling of 121518107 in words is "one hundred twenty-one million, five hundred eighteen thousand, one hundred seven".