121028385 has 16 divisors (see below), whose sum is σ = 203837760. Its totient is φ = 61151040.

The previous prime is 121028363. The next prime is 121028419. The reversal of 121028385 is 583820121.

It is not a de Polignac number, because 121028385 - 2⁹ = 121027873 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212046 + ... + 212615.

It is an arithmetic number, because the mean of its divisors is an integer number (12739860).

Almost surely, 2^121028385 is an apocalyptic number.

121028385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121028385 is a deficient number, since it is larger than the sum of its proper divisors (82809375).

121028385 is a wasteful number, since it uses less digits than its factorization.

121028385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424688.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 121028385 is about 11001.2901516140. The cubic root of 121028385 is about 494.6474175247.

The spelling of 121028385 in words is "one hundred twenty-one million, twenty-eight thousand, three hundred eighty-five".