121347980 has 24 divisors (see below), whose sum is σ = 274433712. Its totient is φ = 44805312.

The previous prime is 121347959. The next prime is 121347991. The reversal of 121347980 is 89743121.

It is a self number, because there is not a number n which added to its sum of digits gives 121347980.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233102 + ... + 233621.

It is an arithmetic number, because the mean of its divisors is an integer number (11434738).

Almost surely, 2^121347980 is an apocalyptic number.

121347980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121347980 is an abundant number, since it is smaller than the sum of its proper divisors (153085732).

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

121347980 is a wasteful number, since it uses less digits than its factorization.

121347980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466745 (or 466743 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 121347980 is about 11015.8059169541. The cubic root of 121347980 is about 495.0824336407.

The spelling of 121347980 in words is "one hundred twenty-one million, three hundred forty-seven thousand, nine hundred eighty".