136202030221 has 4 divisors (see below), whose sum is σ = 136220520700. Its totient is φ = 136183539744.

The previous prime is 136202030201. The next prime is 136202030339. The reversal of 136202030221 is 122030202631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122030202631 = 797 ⋅153111923.

It can be written as a sum of positive squares in 2 ways, for example, as 91272868996 + 44929161225 = 302114^2 + 211965^2 .

It is a cyclic number.

It is not a de Polignac number, because 136202030221 - 2⁷ = 136202030093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136202030192 and 136202030201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136202030201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9234186 + ... + 9248923.

It is an arithmetic number, because the mean of its divisors is an integer number (34055130175).

Almost surely, 2^136202030221 is an apocalyptic number.

It is an amenable number.

136202030221 is a deficient number, since it is larger than the sum of its proper divisors (18490479).

136202030221 is an equidigital number, since it uses as much as digits as its factorization.

136202030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18490478.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 136202030221 its reverse (122030202631), we get a palindrome (258232232852).

The spelling of 136202030221 in words is "one hundred thirty-six billion, two hundred two million, thirty thousand, two hundred twenty-one".