121553384 has 16 divisors (see below), whose sum is σ = 235772100. Its totient is φ = 58680832.

The previous prime is 121553381. The next prime is 121553401. The reversal of 121553384 is 483355121.

It can be written as a sum of positive squares in 2 ways, for example, as 109788484 + 11764900 = 10478^2 + 3430^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121553384.

It is not an unprimeable number, because it can be changed into a prime (121553381) 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, 261737 + ... + 262200.

Almost surely, 2^121553384 is an apocalyptic number.

It is an amenable number.

121553384 is a deficient number, since it is larger than the sum of its proper divisors (114218716).

121553384 is a wasteful number, since it uses less digits than its factorization.

121553384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523972 (or 523968 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 121553384 is about 11025.1251240065. The cubic root of 121553384 is about 495.3616158422.

The spelling of 121553384 in words is "one hundred twenty-one million, five hundred fifty-three thousand, three hundred eighty-four".