121403328 has 56 divisors (see below), whose sum is σ = 324215760. Its totient is φ = 40089600.

The previous prime is 121403311. The next prime is 121403351. The reversal of 121403328 is 823304121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 121403298 and 121403307.

It is a congruent number.

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, 18028 + ... + 23828.

Almost surely, 2^121403328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121403328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162107880).

121403328 is an abundant number, since it is smaller than the sum of its proper divisors (202812432).

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

121403328 is a wasteful number, since it uses less digits than its factorization.

121403328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5925 (or 5915 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 121403328 is about 11018.3178389444. The cubic root of 121403328 is about 495.1576928457.

Adding to 121403328 its reverse (823304121), we get a palindrome (944707449).

The spelling of 121403328 in words is "one hundred twenty-one million, four hundred three thousand, three hundred twenty-eight".