121800404 has 12 divisors (see below), whose sum is σ = 232528128. Its totient is φ = 55363800.

The previous prime is 121800397. The next prime is 121800409. The reversal of 121800404 is 404008121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121800409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1384052 + ... + 1384139.

It is an arithmetic number, because the mean of its divisors is an integer number (19377344).

Almost surely, 2^121800404 is an apocalyptic number.

It is an amenable number.

121800404 is a deficient number, since it is larger than the sum of its proper divisors (110727724).

121800404 is a wasteful number, since it uses less digits than its factorization.

121800404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2768206 (or 2768204 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 121800404 is about 11036.3220322714. The cubic root of 121800404 is about 495.6969456825.

Adding to 121800404 its reverse (404008121), we get a palindrome (525808525).

The spelling of 121800404 in words is "one hundred twenty-one million, eight hundred thousand, four hundred four".