133523403521321 has 8 divisors (see below), whose sum is σ = 145662009149088. Its totient is φ = 121384816960000.

The previous prime is 133523403521303. The next prime is 133523403521323. The reversal of 133523403521321 is 123125304325331.

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

It is not a de Polignac number, because 133523403521321 - 2²⁶ = 133523336412457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133523403521323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12639806 + ... + 20659416.

It is an arithmetic number, because the mean of its divisors is an integer number (18207751143636).

Almost surely, 2^{133523403521321} is an apocalyptic number.

133523403521321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133523403521321 is a deficient number, since it is larger than the sum of its proper divisors (12138605627767).

133523403521321 is a wasteful number, since it uses less digits than its factorization.

133523403521321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9533223.

The product of its (nonzero) digits is 194400, while the sum is 38.

Adding to 133523403521321 its reverse (123125304325331), we get a palindrome (256648707846652).

The spelling of 133523403521321 in words is "one hundred thirty-three trillion, five hundred twenty-three billion, four hundred three million, five hundred twenty-one thousand, three hundred twenty-one".