121899648 has 64 divisors (see below), whose sum is σ = 348717600. Its totient is φ = 37506048.

The previous prime is 121899647. The next prime is 121899653. The reversal of 121899648 is 846998121.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 121899597 and 121899606.

It is not an unprimeable number, because it can be changed into a prime (121899641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7218 + ... + 17201.

Almost surely, 2^121899648 is an apocalyptic number.

It is an amenable number.

121899648 is an abundant number, since it is smaller than the sum of its proper divisors (226817952).

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

121899648 is a wasteful number, since it uses less digits than its factorization.

121899648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24449 (or 24437 counting only the distinct ones).

The product of its digits is 248832, while the sum is 48.

The square root of 121899648 is about 11040.8173610471. The cubic root of 121899648 is about 495.8315418212.

The spelling of 121899648 in words is "one hundred twenty-one million, eight hundred ninety-nine thousand, six hundred forty-eight".