121520885 has 8 divisors (see below), whose sum is σ = 146589696. Its totient is φ = 96706960.

The previous prime is 121520873. The next prime is 121520887. The reversal of 121520885 is 588025121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121520885 - 2⁴ = 121520869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121520887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62669 + ... + 64578.

It is an arithmetic number, because the mean of its divisors is an integer number (18323712).

Almost surely, 2^121520885 is an apocalyptic number.

It is an amenable number.

121520885 is a deficient number, since it is larger than the sum of its proper divisors (25068811).

121520885 is a wasteful number, since it uses less digits than its factorization.

121520885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127443.

The product of its (nonzero) digits is 6400, while the sum is 32.

The square root of 121520885 is about 11023.6511646550. The cubic root of 121520885 is about 495.3174646180.

The spelling of 121520885 in words is "one hundred twenty-one million, five hundred twenty thousand, eight hundred eighty-five".