16121333 has 4 divisors (see below), whose sum is σ = 16641408. Its totient is φ = 15601260.

The previous prime is 16121311. The next prime is 16121341. The reversal of 16121333 is 33312161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33312161 = 61 ⋅546101.

It is a cyclic number.

It is not a de Polignac number, because 16121333 - 2⁶ = 16121269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16121363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259991 + ... + 260052.

It is an arithmetic number, because the mean of its divisors is an integer number (4160352).

Almost surely, 2^16121333 is an apocalyptic number.

It is an amenable number.

16121333 is a deficient number, since it is larger than the sum of its proper divisors (520075).

16121333 is an equidigital number, since it uses as much as digits as its factorization.

16121333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520074.

The product of its digits is 324, while the sum is 20.

The square root of 16121333 is about 4015.1379801945. The cubic root of 16121333 is about 252.6195649798.

Adding to 16121333 its reverse (33312161), we get a palindrome (49433494).

The spelling of 16121333 in words is "sixteen million, one hundred twenty-one thousand, three hundred thirty-three".