136107221 has 2 divisors, whose sum is σ = 136107222. Its totient is φ = 136107220.

The previous prime is 136107211. The next prime is 136107227. The reversal of 136107221 is 122701631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102292996 + 33814225 = 10114^2 + 5815^2 .

It is a cyclic number.

It is not a de Polignac number, because 136107221 - 2¹⁰ = 136106197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136107227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68053610 + 68053611.

It is an arithmetic number, because the mean of its divisors is an integer number (68053611).

Almost surely, 2^136107221 is an apocalyptic number.

It is an amenable number.

136107221 is a deficient number, since it is larger than the sum of its proper divisors (1).

136107221 is an equidigital number, since it uses as much as digits as its factorization.

136107221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 136107221 is about 11666.4999464278. The cubic root of 136107221 is about 514.3914274274.

Adding to 136107221 its reverse (122701631), we get a palindrome (258808852).

The spelling of 136107221 in words is "one hundred thirty-six million, one hundred seven thousand, two hundred twenty-one".