121516577 has 24 divisors (see below), whose sum is σ = 153017280. Its totient is φ = 94461120.

The previous prime is 121516553. The next prime is 121516589. The reversal of 121516577 is 775615121.

It is not a de Polignac number, because 121516577 - 2⁶ = 121516513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121516877) 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, 68927 + ... + 70667.

It is an arithmetic number, because the mean of its divisors is an integer number (6375720).

Almost surely, 2^121516577 is an apocalyptic number.

It is an amenable number.

121516577 is a deficient number, since it is larger than the sum of its proper divisors (31500703).

121516577 is a wasteful number, since it uses less digits than its factorization.

121516577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833 (or 1820 counting only the distinct ones).

The product of its digits is 14700, while the sum is 35.

The square root of 121516577 is about 11023.4557648679. The cubic root of 121516577 is about 495.3116114325.

The spelling of 121516577 in words is "one hundred twenty-one million, five hundred sixteen thousand, five hundred seventy-seven".