133234320221 has 4 divisors (see below), whose sum is σ = 134607870012. Its totient is φ = 131860770432.

The previous prime is 133234320173. The next prime is 133234320229. The reversal of 133234320221 is 122023432331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122023432331 = 1301 ⋅93792031.

It can be written as a sum of positive squares in 2 ways, for example, as 99521320900 + 33712999321 = 315470^2 + 183611^2 .

It is a cyclic number.

It is not a de Polignac number, because 133234320221 - 2²⁶ = 133167211357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133234320229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 686774750 + ... + 686774943.

It is an arithmetic number, because the mean of its divisors is an integer number (33651967503).

Almost surely, 2^133234320221 is an apocalyptic number.

It is an amenable number.

133234320221 is a deficient number, since it is larger than the sum of its proper divisors (1373549791).

133234320221 is an equidigital number, since it uses as much as digits as its factorization.

133234320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373549790.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 133234320221 its reverse (122023432331), we get a palindrome (255257752552).

The spelling of 133234320221 in words is "one hundred thirty-three billion, two hundred thirty-four million, three hundred twenty thousand, two hundred twenty-one".