133103321 has 4 divisors (see below), whose sum is σ = 143342052. Its totient is φ = 122864592.

The previous prime is 133103317. The next prime is 133103363. The reversal of 133103321 is 123301331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20976400 + 112126921 = 4580^2 + 10589^2 .

It is a cyclic number.

It is not a de Polignac number, because 133103321 - 2² = 133103317 is a prime.

It is a super-2 number, since 2×133103321² = 35432988122458082, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133103321.

It is not an unprimeable number, because it can be changed into a prime (133103371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5119346 + ... + 5119371.

It is an arithmetic number, because the mean of its divisors is an integer number (35835513).

Almost surely, 2^133103321 is an apocalyptic number.

It is an amenable number.

133103321 is a deficient number, since it is larger than the sum of its proper divisors (10238731).

133103321 is a wasteful number, since it uses less digits than its factorization.

133103321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10238730.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 133103321 is about 11537.0412584856. The cubic root of 133103321 is about 510.5790181405.

Adding to 133103321 its reverse (123301331), we get a palindrome (256404652).

The spelling of 133103321 in words is "one hundred thirty-three million, one hundred three thousand, three hundred twenty-one".