121918525 has 24 divisors (see below), whose sum is σ = 154365120. Its totient is φ = 95504640.

The previous prime is 121918513. The next prime is 121918529. The reversal of 121918525 is 525819121.

It is not a de Polignac number, because 121918525 - 2¹¹ = 121916477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121918529) 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, 290766 + ... + 291184.

It is an arithmetic number, because the mean of its divisors is an integer number (6431880).

Almost surely, 2^121918525 is an apocalyptic number.

It is an amenable number.

121918525 is a deficient number, since it is larger than the sum of its proper divisors (32446595).

121918525 is a wasteful number, since it uses less digits than its factorization.

121918525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645 (or 640 counting only the distinct ones).

The product of its digits is 7200, while the sum is 34.

The square root of 121918525 is about 11041.6722012565. The cubic root of 121918525 is about 495.8571348099.

The spelling of 121918525 in words is "one hundred twenty-one million, nine hundred eighteen thousand, five hundred twenty-five".