136301221 has 4 divisors (see below), whose sum is σ = 155772832. Its totient is φ = 116829612.

The previous prime is 136301183. The next prime is 136301227. The reversal of 136301221 is 122103631.

136301221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 136301221 - 2⁷ = 136301093 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 (136301227) 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, 9735795 + ... + 9735808.

It is an arithmetic number, because the mean of its divisors is an integer number (38943208).

Almost surely, 2^136301221 is an apocalyptic number.

It is an amenable number.

136301221 is a deficient number, since it is larger than the sum of its proper divisors (19471611).

136301221 is an equidigital number, since it uses as much as digits as its factorization.

136301221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19471610.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 136301221 is about 11674.8113903395. The cubic root of 136301221 is about 514.6357068051.

Adding to 136301221 its reverse (122103631), we get a palindrome (258404852).

The spelling of 136301221 in words is "one hundred thirty-six million, three hundred one thousand, two hundred twenty-one".