136771221 has 8 divisors (see below), whose sum is σ = 188650080. Its totient is φ = 88036592.

The previous prime is 136771213. The next prime is 136771223. The reversal of 136771221 is 122177631.

136771221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 136771221 - 2³ = 136771213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136771223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 785955 + ... + 786128.

It is an arithmetic number, because the mean of its divisors is an integer number (23581260).

Almost surely, 2^136771221 is an apocalyptic number.

It is an amenable number.

136771221 is a deficient number, since it is larger than the sum of its proper divisors (51878859).

136771221 is a wasteful number, since it uses less digits than its factorization.

136771221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572115.

The product of its digits is 3528, while the sum is 30.

The square root of 136771221 is about 11694.9228727683. The cubic root of 136771221 is about 515.2265581873.

The spelling of 136771221 in words is "one hundred thirty-six million, seven hundred seventy-one thousand, two hundred twenty-one".