121251328 has 40 divisors (see below), whose sum is σ = 264302280. Its totient is φ = 55111680.

The previous prime is 121251301. The next prime is 121251329. The reversal of 121251328 is 823152121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121251329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5133 + ... + 16396.

It is an arithmetic number, because the mean of its divisors is an integer number (6607557).

Almost surely, 2^121251328 is an apocalyptic number.

It is an amenable number.

121251328 is an abundant number, since it is smaller than the sum of its proper divisors (143050952).

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

121251328 is an equidigital number, since it uses as much as digits as its factorization.

121251328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21558 (or 21542 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

The square root of 121251328 is about 11011.4180739812. The cubic root of 121251328 is about 494.9509566076.

The spelling of 121251328 in words is "one hundred twenty-one million, two hundred fifty-one thousand, three hundred twenty-eight".