133333121 has 4 divisors (see below), whose sum is σ = 133489200. Its totient is φ = 133177044.

The previous prime is 133333111. The next prime is 133333141. The reversal of 133333121 is 121333331.

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 133333121 - 2¹⁰ = 133332097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 133333093 and 133333102.

It is not an unprimeable number, because it can be changed into a prime (133333111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76751 + ... + 78468.

It is an arithmetic number, because the mean of its divisors is an integer number (33372300).

Almost surely, 2^133333121 is an apocalyptic number.

It is an amenable number.

133333121 is a deficient number, since it is larger than the sum of its proper divisors (156079).

133333121 is an equidigital number, since it uses as much as digits as its factorization.

133333121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156078.

The product of its digits is 486, while the sum is 20.

The square root of 133333121 is about 11546.9961894858. The cubic root of 133333121 is about 510.8726837405.

Adding to 133333121 its reverse (121333331), we get a palindrome (254666452).

The spelling of 133333121 in words is "one hundred thirty-three million, three hundred thirty-three thousand, one hundred twenty-one".