121409681424 has 20 divisors (see below), whose sum is σ = 313641677136. Its totient is φ = 40469893792.

The previous prime is 121409681401. The next prime is 121409681513. The reversal of 121409681424 is 424186904121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1264684134 + ... + 1264684229.

Almost surely, 2^121409681424 is an apocalyptic number.

It is an amenable number.

121409681424 is an abundant number, since it is smaller than the sum of its proper divisors (192231995712).

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

121409681424 is a wasteful number, since it uses less digits than its factorization.

121409681424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2529368374 (or 2529368368 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The spelling of 121409681424 in words is "one hundred twenty-one billion, four hundred nine million, six hundred eighty-one thousand, four hundred twenty-four".