121333403 has 4 divisors (see below), whose sum is σ = 128470680. Its totient is φ = 114196128.

The previous prime is 121333393. The next prime is 121333417. The reversal of 121333403 is 304333121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304333121 = 4339 ⋅70139.

It is a cyclic number.

It is not a de Polignac number, because 121333403 - 2⁶ = 121333339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121333423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3568613 + ... + 3568646.

It is an arithmetic number, because the mean of its divisors is an integer number (32117670).

Almost surely, 2^121333403 is an apocalyptic number.

121333403 is a deficient number, since it is larger than the sum of its proper divisors (7137277).

121333403 is an equidigital number, since it uses as much as digits as its factorization.

121333403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7137276.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 121333403 is about 11015.1442568856. The cubic root of 121333403 is about 495.0626088205.

Adding to 121333403 its reverse (304333121), we get a palindrome (425666524).

The spelling of 121333403 in words is "one hundred twenty-one million, three hundred thirty-three thousand, four hundred three".