133017384821 has 4 divisors (see below), whose sum is σ = 133019728812. Its totient is φ = 133015040832.

The previous prime is 133017384793. The next prime is 133017384839. The reversal of 133017384821 is 128483710331.

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 76018209796 + 56999175025 = 275714^2 + 238745^2 .

It is a cyclic number.

It is not a de Polignac number, because 133017384821 - 2⁶ = 133017384757 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 (133017384881) 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 3 ways as a sum of consecutive naturals, for example, 1084706 + ... + 1201091.

It is an arithmetic number, because the mean of its divisors is an integer number (33254932203).

Almost surely, 2^133017384821 is an apocalyptic number.

It is an amenable number.

133017384821 is a deficient number, since it is larger than the sum of its proper divisors (2343991).

133017384821 is an equidigital number, since it uses as much as digits as its factorization.

133017384821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2343990.

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 133017384821 in words is "one hundred thirty-three billion, seventeen million, three hundred eighty-four thousand, eight hundred twenty-one".