121900648 has 16 divisors (see below), whose sum is σ = 229934880. Its totient is φ = 60584688.

The previous prime is 121900633. The next prime is 121900663. The reversal of 121900648 is 846009121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121900633) and next prime (121900663).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44286 + ... + 46957.

It is an arithmetic number, because the mean of its divisors is an integer number (14370930).

Almost surely, 2^121900648 is an apocalyptic number.

It is an amenable number.

121900648 is a deficient number, since it is larger than the sum of its proper divisors (108034232).

121900648 is a wasteful number, since it uses less digits than its factorization.

121900648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91416 (or 91412 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 121900648 is about 11040.8626474565. The cubic root of 121900648 is about 495.8328976638.

Adding to 121900648 its reverse (846009121), we get a palindrome (967909769).

The spelling of 121900648 in words is "one hundred twenty-one million, nine hundred thousand, six hundred forty-eight".