133465013163221 has 4 divisors (see below), whose sum is σ = 133465326628332. Its totient is φ = 133464699698112.

The previous prime is 133465013163127. The next prime is 133465013163241. The reversal of 133465013163221 is 122361310564331.

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 77645810162596 + 55819203000625 = 8811686^2 + 7471225^2 .

It is a cyclic number.

It is not a de Polignac number, because 133465013163221 - 2¹⁴ = 133465013146837 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 (133465013163241) 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, 156093026 + ... + 156945731.

It is an arithmetic number, because the mean of its divisors is an integer number (33366331657083).

Almost surely, 2^{133465013163221} is an apocalyptic number.

It is an amenable number.

133465013163221 is a deficient number, since it is larger than the sum of its proper divisors (313465111).

133465013163221 is an equidigital number, since it uses as much as digits as its factorization.

133465013163221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313465110.

The product of its (nonzero) digits is 233280, while the sum is 41.

The spelling of 133465013163221 in words is "one hundred thirty-three trillion, four hundred sixty-five billion, thirteen million, one hundred sixty-three thousand, two hundred twenty-one".