133203121 has 8 divisors (see below), whose sum is σ = 136520384. Its totient is φ = 129895920.

The previous prime is 133203113. The next prime is 133203139. The reversal of 133203121 is 121302331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133203121 - 2³ = 133203113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133203095 and 133203104.

It is not an unprimeable number, because it can be changed into a prime (133203101) 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 7 ways as a sum of consecutive naturals, for example, 29131 + ... + 33391.

It is an arithmetic number, because the mean of its divisors is an integer number (17065048).

Almost surely, 2^133203121 is an apocalyptic number.

It is an amenable number.

133203121 is a deficient number, since it is larger than the sum of its proper divisors (3317263).

133203121 is an equidigital number, since it uses as much as digits as its factorization.

133203121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5031.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 133203121 is about 11541.3656470974. The cubic root of 133203121 is about 510.7065958635.

Adding to 133203121 its reverse (121302331), we get a palindrome (254505452).

The spelling of 133203121 in words is "one hundred thirty-three million, two hundred three thousand, one hundred twenty-one".