136175521221 has 16 divisors (see below), whose sum is σ = 205547958720. Its totient is φ = 89070780240.

The previous prime is 136175521213. The next prime is 136175521247. The reversal of 136175521221 is 122125571631.

136175521221 is a `hidden beast` number, since 1 + 3 + 61 + 75 + 521 + 2 + 2 + 1 = 666.

It is not a de Polignac number, because 136175521221 - 2³ = 136175521213 is a prime.

It is a super-2 number, since 2×136175521221² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136175521271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47579115 + ... + 47581976.

It is an arithmetic number, because the mean of its divisors is an integer number (12846747420).

Almost surely, 2^136175521221 is an apocalyptic number.

It is an amenable number.

136175521221 is a deficient number, since it is larger than the sum of its proper divisors (69372437499).

136175521221 is an equidigital number, since it uses as much as digits as its factorization.

136175521221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95161153 (or 95161147 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

It can be divided in two parts, 1361755 and 21221, that added together give a square (1382976 = 1176²).

The spelling of 136175521221 in words is "one hundred thirty-six billion, one hundred seventy-five million, five hundred twenty-one thousand, two hundred twenty-one".