121305144 has 32 divisors (see below), whose sum is σ = 313722000. Its totient is φ = 39040512.

The previous prime is 121305127. The next prime is 121305157. The reversal of 121305144 is 441503121.

It is a self number, because there is not a number n which added to its sum of digits gives 121305144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86449 + ... + 87840.

Almost surely, 2^121305144 is an apocalyptic number.

It is an amenable number.

121305144 is an abundant number, since it is smaller than the sum of its proper divisors (192416856).

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

121305144 is a wasteful number, since it uses less digits than its factorization.

121305144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174327 (or 174323 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 121305144 is about 11013.8614481934. The cubic root of 121305144 is about 495.0241718632.

Adding to 121305144 its reverse (441503121), we get a palindrome (562808265).

The spelling of 121305144 in words is "one hundred twenty-one million, three hundred five thousand, one hundred forty-four".