121378836 has 24 divisors (see below), whose sum is σ = 285382944. Its totient is φ = 40150240.

The previous prime is 121378801. The next prime is 121378841. The reversal of 121378836 is 638873121.

It is a junction number, because it is equal to n+sod(n) for n = 121378794 and 121378803.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 37035 + ... + 40178.

It is an arithmetic number, because the mean of its divisors is an integer number (11890956).

Almost surely, 2^121378836 is an apocalyptic number.

It is an amenable number.

121378836 is an abundant number, since it is smaller than the sum of its proper divisors (164004108).

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

121378836 is a wasteful number, since it uses less digits than its factorization.

121378836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77351 (or 77349 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 121378836 is about 11017.2063609610. The cubic root of 121378836 is about 495.1243927760.

The spelling of 121378836 in words is "one hundred twenty-one million, three hundred seventy-eight thousand, eight hundred thirty-six".