121016660 has 24 divisors (see below), whose sum is σ = 257717376. Its totient is φ = 47724320.

The previous prime is 121016647. The next prime is 121016669. The reversal of 121016660 is 66610121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121016669) 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 7 ways as a sum of consecutive naturals, for example, 41192 + ... + 44031.

It is an arithmetic number, because the mean of its divisors is an integer number (10738224).

Almost surely, 2^121016660 is an apocalyptic number.

121016660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121016660 is an abundant number, since it is smaller than the sum of its proper divisors (136700716).

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

121016660 is a wasteful number, since it uses less digits than its factorization.

121016660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85303 (or 85301 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 121016660 is about 11000.7572466626. The cubic root of 121016660 is about 494.6314435081.

Adding to 121016660 its reverse (66610121), we get a palindrome (187626781).

The spelling of 121016660 in words is "one hundred twenty-one million, sixteen thousand, six hundred sixty".