121582128 has 40 divisors (see below), whose sum is σ = 317337328. Its totient is φ = 40108032.

The previous prime is 121582103. The next prime is 121582133. The reversal of 121582128 is 821285121.

It is a junction number, because it is equal to n+sod(n) for n = 121582095 and 121582104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8401 + ... + 17712.

Almost surely, 2^121582128 is an apocalyptic number.

It is an amenable number.

121582128 is an abundant number, since it is smaller than the sum of its proper divisors (195755200).

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

121582128 is a wasteful number, since it uses less digits than its factorization.

121582128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26221 (or 26215 counting only the distinct ones).

The product of its digits is 2560, while the sum is 30.

The square root of 121582128 is about 11026.4286149233. The cubic root of 121582128 is about 495.4006591871.

The spelling of 121582128 in words is "one hundred twenty-one million, five hundred eighty-two thousand, one hundred twenty-eight".