121608128 has 28 divisors (see below), whose sum is σ = 246933720. Its totient is φ = 59388672.

The previous prime is 121608077. The next prime is 121608131. The reversal of 121608128 is 821806121.

It is a self number, because there is not a number n which added to its sum of digits gives 121608128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19343 + ... + 24846.

Almost surely, 2^121608128 is an apocalyptic number.

It is an amenable number.

121608128 is an abundant number, since it is smaller than the sum of its proper divisors (125325592).

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

121608128 is an equidigital number, since it uses as much as digits as its factorization.

121608128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44244 (or 44234 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 121608128 is about 11027.6075374489. The cubic root of 121608128 is about 495.4359700213.

The spelling of 121608128 in words is "one hundred twenty-one million, six hundred eight thousand, one hundred twenty-eight".