134823685221 has 20 divisors (see below), whose sum is σ = 213250536972. Its totient is φ = 84595252608.

The previous prime is 134823685219. The next prime is 134823685223. The reversal of 134823685221 is 122586328431.

134823685221 is a `hidden beast` number, since 1 + 3 + 48 + 23 + 68 + 522 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (134823685219) and next prime (134823685223).

It can be written as a sum of positive squares in 2 ways, for example, as 124150522500 + 10673162721 = 352350^2 + 103311^2 .

It is not a de Polignac number, because 134823685221 - 2¹ = 134823685219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134823685223) 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 19 ways as a sum of consecutive naturals, for example, 48954210 + ... + 48956963.

Almost surely, 2^134823685221 is an apocalyptic number.

It is an amenable number.

134823685221 is a deficient number, since it is larger than the sum of its proper divisors (78426851751).

134823685221 is an equidigital number, since it uses as much as digits as its factorization.

134823685221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97911202 (or 97911193 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The spelling of 134823685221 in words is "one hundred thirty-four billion, eight hundred twenty-three million, six hundred eighty-five thousand, two hundred twenty-one".