121123428 has 24 divisors (see below), whose sum is σ = 294909888. Its totient is φ = 38618976.

The previous prime is 121123421. The next prime is 121123439. The reversal of 121123428 is 824321121.

It is a super-4 number, since 4×121123428⁴ (a number of 33 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121123398 and 121123407.

It is not an unprimeable number, because it can be changed into a prime (121123421) 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, 219151 + ... + 219702.

It is an arithmetic number, because the mean of its divisors is an integer number (12287912).

Almost surely, 2^121123428 is an apocalyptic number.

It is an amenable number.

121123428 is an abundant number, since it is smaller than the sum of its proper divisors (173786460).

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

121123428 is a wasteful number, since it uses less digits than its factorization.

121123428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438883 (or 438881 counting only the distinct ones).

The product of its digits is 768, while the sum is 24.

The square root of 121123428 is about 11005.6089336302. The cubic root of 121123428 is about 494.7768650466.

Adding to 121123428 its reverse (824321121), we get a palindrome (945444549).

The spelling of 121123428 in words is "one hundred twenty-one million, one hundred twenty-three thousand, four hundred twenty-eight".