20121333 has 4 divisors (see below), whose sum is σ = 26828448. Its totient is φ = 13414220.

The previous prime is 20121307. The next prime is 20121337. The reversal of 20121333 is 33312102.

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.

It is a cyclic number.

It is not a de Polignac number, because 20121333 - 2¹⁶ = 20055797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3353553 + ... + 3353558.

It is an arithmetic number, because the mean of its divisors is an integer number (6707112).

Almost surely, 2^20121333 is an apocalyptic number.

It is an amenable number.

20121333 is a deficient number, since it is larger than the sum of its proper divisors (6707115).

20121333 is an equidigital number, since it uses as much as digits as its factorization.

20121333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6707114.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 20121333 is about 4485.6808847710. The cubic root of 20121333 is about 271.9895694169.

Adding to 20121333 its reverse (33312102), we get a palindrome (53433435).

The spelling of 20121333 in words is "twenty million, one hundred twenty-one thousand, three hundred thirty-three".