133201031321 has 4 divisors (see below), whose sum is σ = 133357188132. Its totient is φ = 133044874512.

The previous prime is 133201031317. The next prime is 133201031323. The reversal of 133201031321 is 123130102331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123130102331 = 19429 ⋅6337439.

It can be written as a sum of positive squares in 2 ways, for example, as 67016265625 + 66184765696 = 258875^2 + 257264^2 .

It is a cyclic number.

It is not a de Polignac number, because 133201031321 - 2² = 133201031317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133201031293 and 133201031302.

It is not an unprimeable number, because it can be changed into a prime (133201031323) 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, 78077126 + ... + 78078831.

It is an arithmetic number, because the mean of its divisors is an integer number (33339297033).

Almost surely, 2^133201031321 is an apocalyptic number.

It is an amenable number.

133201031321 is a deficient number, since it is larger than the sum of its proper divisors (156156811).

133201031321 is an equidigital number, since it uses as much as digits as its factorization.

133201031321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156156810.

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

Adding to 133201031321 its reverse (123130102331), we get a palindrome (256331133652).

The spelling of 133201031321 in words is "one hundred thirty-three billion, two hundred one million, thirty-one thousand, three hundred twenty-one".