121159780 has 48 divisors (see below), whose sum is σ = 300174336. Its totient is φ = 40199040.

The previous prime is 121159763. The next prime is 121159807. The reversal of 121159780 is 87951121.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9619 + ... + 18298.

It is an arithmetic number, because the mean of its divisors is an integer number (6253632).

Almost surely, 2^121159780 is an apocalyptic number.

121159780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121159780 is an abundant number, since it is smaller than the sum of its proper divisors (179014556).

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

121159780 is a wasteful number, since it uses less digits than its factorization.

121159780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27964 (or 27962 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 34.

The square root of 121159780 is about 11007.2603312541. The cubic root of 121159780 is about 494.8263581679.

The spelling of 121159780 in words is "one hundred twenty-one million, one hundred fifty-nine thousand, seven hundred eighty".