121456566 has 48 divisors (see below), whose sum is σ = 328094208. Its totient is φ = 31546800.

The previous prime is 121456561. The next prime is 121456567. The reversal of 121456566 is 665654121.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121456566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121456561) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 42430 + ... + 45201.

It is an arithmetic number, because the mean of its divisors is an integer number (6835296).

Almost surely, 2^121456566 is an apocalyptic number.

121456566 is an abundant number, since it is smaller than the sum of its proper divisors (206637642).

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

121456566 is a wasteful number, since it uses less digits than its factorization.

121456566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87657 (or 87654 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 121456566 is about 11020.7334601650. The cubic root of 121456566 is about 495.2300614078.

The spelling of 121456566 in words is "one hundred twenty-one million, four hundred fifty-six thousand, five hundred sixty-six".