121686324 has 12 divisors (see below), whose sum is σ = 283934784. Its totient is φ = 40562104.

The previous prime is 121686247. The next prime is 121686329. The reversal of 121686324 is 423686121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×121686324² = 29615122897265952, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121686329) 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 in 3 ways as a sum of consecutive naturals, for example, 5070252 + ... + 5070275.

It is an arithmetic number, because the mean of its divisors is an integer number (23661232).

Almost surely, 2^121686324 is an apocalyptic number.

It is an amenable number.

121686324 is an abundant number, since it is smaller than the sum of its proper divisors (162248460).

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

121686324 is a wasteful number, since it uses less digits than its factorization.

121686324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10140534 (or 10140532 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 121686324 is about 11031.1524329963. The cubic root of 121686324 is about 495.5421383917.

The spelling of 121686324 in words is "one hundred twenty-one million, six hundred eighty-six thousand, three hundred twenty-four".