121028028 has 24 divisors (see below), whose sum is σ = 308071680. Its totient is φ = 36675120.

The previous prime is 121027993. The next prime is 121028029. The reversal of 121028028 is 820820121.

It is a junction number, because it is equal to n+sod(n) for n = 121027989 and 121028007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121028029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458308 + ... + 458571.

It is an arithmetic number, because the mean of its divisors is an integer number (12836320).

Almost surely, 2^121028028 is an apocalyptic number.

It is an amenable number.

121028028 is an abundant number, since it is smaller than the sum of its proper divisors (187043652).

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

121028028 is a wasteful number, since it uses less digits than its factorization.

121028028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916897 (or 916895 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 121028028 is about 11001.2739262324. The cubic root of 121028028 is about 494.6469311669.

Adding to 121028028 its reverse (820820121), we get a palindrome (941848149).

The spelling of 121028028 in words is "one hundred twenty-one million, twenty-eight thousand, twenty-eight".