121304512 has 56 divisors (see below), whose sum is σ = 289600640. Its totient is φ = 49248000.

The previous prime is 121304501. The next prime is 121304551. The reversal of 121304512 is 215403121.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 121304512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1387 + ... + 15637.

It is an arithmetic number, because the mean of its divisors is an integer number (5171440).

Almost surely, 2^121304512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121304512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144800320).

121304512 is an abundant number, since it is smaller than the sum of its proper divisors (168296128).

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

121304512 is a wasteful number, since it uses less digits than its factorization.

121304512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14289 (or 14279 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 121304512 is about 11013.8327570379. The cubic root of 121304512 is about 495.0233121694.

Adding to 121304512 its reverse (215403121), we get a palindrome (336707633).

The spelling of 121304512 in words is "one hundred twenty-one million, three hundred four thousand, five hundred twelve".