121383648 has 36 divisors (see below), whose sum is σ = 345185568. Its totient is φ = 40461120.

The previous prime is 121383641. The next prime is 121383649. The reversal of 121383648 is 846383121.

121383648 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 8 + 3 + 648 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121383641) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 210448 + ... + 211023.

It is an arithmetic number, because the mean of its divisors is an integer number (9588488).

Almost surely, 2^121383648 is an apocalyptic number.

121383648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

121383648 is an abundant number, since it is smaller than the sum of its proper divisors (223801920).

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

121383648 is a wasteful number, since it uses less digits than its factorization.

121383648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421487 (or 421476 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 121383648 is about 11017.4247444673. The cubic root of 121383648 is about 495.1309356715.

The spelling of 121383648 in words is "one hundred twenty-one million, three hundred eighty-three thousand, six hundred forty-eight".