121500660 has 48 divisors (see below), whose sum is σ = 340704000. Its totient is φ = 32352384.

The previous prime is 121500623. The next prime is 121500661. The reversal of 121500660 is 66005121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121500661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61366 + ... + 63314.

It is an arithmetic number, because the mean of its divisors is an integer number (7098000).

Almost surely, 2^121500660 is an apocalyptic number.

121500660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121500660 is an abundant number, since it is smaller than the sum of its proper divisors (219203340).

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

121500660 is a wasteful number, since it uses less digits than its factorization.

121500660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3000 (or 2998 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 121500660 is about 11022.7337806916. The cubic root of 121500660 is about 495.2899841523.

Adding to 121500660 its reverse (66005121), we get a palindrome (187505781).

The spelling of 121500660 in words is "one hundred twenty-one million, five hundred thousand, six hundred sixty".