121404144 has 20 divisors (see below), whose sum is σ = 313627496. Its totient is φ = 40468032.

The previous prime is 121404131. The next prime is 121404181. The reversal of 121404144 is 441404121.

It is a self number, because there is not a number n which added to its sum of digits gives 121404144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1264579 + ... + 1264674.

Almost surely, 2^121404144 is an apocalyptic number.

It is an amenable number.

121404144 is an abundant number, since it is smaller than the sum of its proper divisors (192223352).

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

121404144 is a wasteful number, since it uses less digits than its factorization.

121404144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2529264 (or 2529258 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 121404144 is about 11018.3548681280. The cubic root of 121404144 is about 495.1588022270.

Adding to 121404144 its reverse (441404121), we get a palindrome (562808265).

The spelling of 121404144 in words is "one hundred twenty-one million, four hundred four thousand, one hundred forty-four".