121803910 has 8 divisors (see below), whose sum is σ = 219247056. Its totient is φ = 48721560.

The previous prime is 121803901. The next prime is 121803917. The reversal of 121803910 is 19308121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121803917) 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, 6090186 + ... + 6090205.

It is an arithmetic number, because the mean of its divisors is an integer number (27405882).

Almost surely, 2^121803910 is an apocalyptic number.

121803910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121803910 is a deficient number, since it is larger than the sum of its proper divisors (97443146).

121803910 is a wasteful number, since it uses less digits than its factorization.

121803910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12180398.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 121803910 is about 11036.4808702774. The cubic root of 121803910 is about 495.7017018156.

The spelling of 121803910 in words is "one hundred twenty-one million, eight hundred three thousand, nine hundred ten".