121911075 has 120 divisors (see below), whose sum is σ = 265930896. Its totient is φ = 54432000.

The previous prime is 121911073. The next prime is 121911079. The reversal of 121911075 is 570119121.

It is not a de Polignac number, because 121911075 - 2¹ = 121911073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (121911071) 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 119 ways as a sum of consecutive naturals, for example, 289365 + ... + 289785.

Almost surely, 2^121911075 is an apocalyptic number.

121911075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121911075 is an abundant number, since it is smaller than the sum of its proper divisors (144019821).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121911075 is a wasteful number, since it uses less digits than its factorization.

121911075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 27.

The square root of 121911075 is about 11041.3348377812. The cubic root of 121911075 is about 495.8470345922.

The spelling of 121911075 in words is "one hundred twenty-one million, nine hundred eleven thousand, seventy-five".