121912075 has 24 divisors (see below), whose sum is σ = 166060800. Its totient is φ = 88371360.

The previous prime is 121912073. The next prime is 121912079. The reversal of 121912075 is 570219121.

It is not a de Polignac number, because 121912075 - 2¹ = 121912073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121912073) 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 in 23 ways as a sum of consecutive naturals, for example, 5346 + ... + 16504.

It is an arithmetic number, because the mean of its divisors is an integer number (6919200).

Almost surely, 2^121912075 is an apocalyptic number.

121912075 is a deficient number, since it is larger than the sum of its proper divisors (44148725).

121912075 is a wasteful number, since it uses less digits than its factorization.

121912075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11211 (or 11206 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 121912075 is about 11041.3801220681. The cubic root of 121912075 is about 495.8483903501.

The spelling of 121912075 in words is "one hundred twenty-one million, nine hundred twelve thousand, seventy-five".