121009404 has 24 divisors (see below), whose sum is σ = 297216640. Its totient is φ = 38213424.

The previous prime is 121009393. The next prime is 121009433. The reversal of 121009404 is 404900121.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 265144 + ... + 265599.

Almost surely, 2^121009404 is an apocalyptic number.

It is an amenable number.

121009404 is an abundant number, since it is smaller than the sum of its proper divisors (176207236).

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

121009404 is a wasteful number, since it uses less digits than its factorization.

121009404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530769 (or 530767 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 121009404 is about 11000.4274462404. The cubic root of 121009404 is about 494.6215574933.

Adding to 121009404 its reverse (404900121), we get a palindrome (525909525).

The spelling of 121009404 in words is "one hundred twenty-one million, nine thousand, four hundred four".