121025680 has 40 divisors (see below), whose sum is σ = 282180600. Its totient is φ = 48273408.

The previous prime is 121025657. The next prime is 121025689. The reversal of 121025680 is 86520121.

It can be written as a sum of positive squares in 4 ways, for example, as 10523536 + 110502144 = 3244^2 + 10512^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (121025689) 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, 29176 + ... + 33064.

It is an arithmetic number, because the mean of its divisors is an integer number (7054515).

Almost surely, 2^121025680 is an apocalyptic number.

121025680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121025680 is an abundant number, since it is smaller than the sum of its proper divisors (161154920).

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

121025680 is a wasteful number, since it uses less digits than its factorization.

121025680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4291 (or 4285 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 121025680 is about 11001.1672108009. The cubic root of 121025680 is about 494.6437323527.

The spelling of 121025680 in words is "one hundred twenty-one million, twenty-five thousand, six hundred eighty".