121553312 has 24 divisors (see below), whose sum is σ = 241510500. Its totient is φ = 60217344.

The previous prime is 121553293. The next prime is 121553329. The reversal of 121553312 is 213355121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 116553616 + 4999696 = 10796^2 + 2236^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13937 + ... + 20912.

Almost surely, 2^121553312 is an apocalyptic number.

It is an amenable number.

121553312 is a deficient number, since it is larger than the sum of its proper divisors (119957188).

121553312 is a wasteful number, since it uses less digits than its factorization.

121553312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34968 (or 34960 counting only the distinct ones).

The product of its digits is 900, while the sum is 23.

The square root of 121553312 is about 11025.1218587370. The cubic root of 121553312 is about 495.3615180359.

The spelling of 121553312 in words is "one hundred twenty-one million, five hundred fifty-three thousand, three hundred twelve".