121530775 has 12 divisors (see below), whose sum is σ = 152193384. Its totient is φ = 96260000.

The previous prime is 121530751. The next prime is 121530809. The reversal of 121530775 is 577035121.

It is not a de Polignac number, because 121530775 - 2¹⁵ = 121498007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 21541 + ... + 26590.

It is an arithmetic number, because the mean of its divisors is an integer number (12682782).

Almost surely, 2^121530775 is an apocalyptic number.

121530775 is a deficient number, since it is larger than the sum of its proper divisors (30662609).

121530775 is a wasteful number, since it uses less digits than its factorization.

121530775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48242 (or 48237 counting only the distinct ones).

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 121530775 is about 11024.0997364864. The cubic root of 121530775 is about 495.3309014217.

Adding to 121530775 its reverse (577035121), we get a palindrome (698565896).

The spelling of 121530775 in words is "one hundred twenty-one million, five hundred thirty thousand, seven hundred seventy-five".