121305424 has 20 divisors (see below), whose sum is σ = 247399840. Its totient is φ = 57460320.

The previous prime is 121305409. The next prime is 121305461. The reversal of 121305424 is 424503121.

It is a junction number, because it is equal to n+sod(n) for n = 121305395 and 121305404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199212 + ... + 199819.

It is an arithmetic number, because the mean of its divisors is an integer number (12369992).

Almost surely, 2^121305424 is an apocalyptic number.

It is an amenable number.

121305424 is an abundant number, since it is smaller than the sum of its proper divisors (126094416).

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

121305424 is a wasteful number, since it uses less digits than its factorization.

121305424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399058 (or 399052 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 121305424 is about 11013.8741594409. The cubic root of 121305424 is about 495.0245527392.

Adding to 121305424 its reverse (424503121), we get a palindrome (545808545).

The spelling of 121305424 in words is "one hundred twenty-one million, three hundred five thousand, four hundred twenty-four".