121315424 has 12 divisors (see below), whose sum is σ = 238839804. Its totient is φ = 60657696.

The previous prime is 121315421. The next prime is 121315459. The reversal of 121315424 is 424513121.

It is a self number, because there is not a number n which added to its sum of digits gives 121315424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121315421) by changing a digit.

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 as a sum of consecutive naturals, namely, 1895522 + ... + 1895585.

It is an arithmetic number, because the mean of its divisors is an integer number (19903317).

Almost surely, 2^121315424 is an apocalyptic number.

It is an amenable number.

121315424 is a deficient number, since it is larger than the sum of its proper divisors (117524380).

121315424 is an equidigital number, since it uses as much as digits as its factorization.

121315424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3791117 (or 3791109 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 121315424 is about 11014.3281229497. The cubic root of 121315424 is about 495.0381550700.

Adding to 121315424 its reverse (424513121), we get a palindrome (545828545).

The spelling of 121315424 in words is "one hundred twenty-one million, three hundred fifteen thousand, four hundred twenty-four".