136171870221 has 16 divisors (see below), whose sum is σ = 193467127104. Its totient is φ = 84896957184.

The previous prime is 136171870097. The next prime is 136171870253. The reversal of 136171870221 is 122078171631.

It is a happy number.

It is not a de Polignac number, because 136171870221 - 2³⁰ = 135098128397 is a prime.

It is a super-3 number, since 3×136171870221³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 136171870221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136171870271) 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, 8495295 + ... + 8511308.

It is an arithmetic number, because the mean of its divisors is an integer number (12091695444).

Almost surely, 2^136171870221 is an apocalyptic number.

It is an amenable number.

136171870221 is a deficient number, since it is larger than the sum of its proper divisors (57295256883).

136171870221 is a wasteful number, since it uses less digits than its factorization.

136171870221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17006780.

The product of its (nonzero) digits is 28224, while the sum is 39.

The spelling of 136171870221 in words is "one hundred thirty-six billion, one hundred seventy-one million, eight hundred seventy thousand, two hundred twenty-one".