121806838 has 8 divisors (see below), whose sum is σ = 183515832. Its totient is φ = 60634896.

The previous prime is 121806833. The next prime is 121806847. The reversal of 121806838 is 838608121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 121806797 and 121806806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121806833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133695 + ... + 134602.

It is an arithmetic number, because the mean of its divisors is an integer number (22939479).

Almost surely, 2^121806838 is an apocalyptic number.

121806838 is a deficient number, since it is larger than the sum of its proper divisors (61708994).

121806838 is a wasteful number, since it uses less digits than its factorization.

121806838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268526.

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 121806838 is about 11036.6135204600. The cubic root of 121806838 is about 495.7056737816.

The spelling of 121806838 in words is "one hundred twenty-one million, eight hundred six thousand, eight hundred thirty-eight".