136564113221 has 16 divisors (see below), whose sum is σ = 139374597888. Its totient is φ = 133781875200.

The previous prime is 136564113209. The next prime is 136564113241. The reversal of 136564113221 is 122311465631.

It is a cyclic number.

It is not a de Polignac number, because 136564113221 - 2¹⁰ = 136564112197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136564113241) 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, 7132541 + ... + 7151661.

It is an arithmetic number, because the mean of its divisors is an integer number (8710912368).

Almost surely, 2^136564113221 is an apocalyptic number.

It is an amenable number.

136564113221 is a deficient number, since it is larger than the sum of its proper divisors (2810484667).

136564113221 is a wasteful number, since it uses less digits than its factorization.

136564113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19852.

The product of its digits is 25920, while the sum is 35.

Adding to 136564113221 its reverse (122311465631), we get a palindrome (258875578852).

The spelling of 136564113221 in words is "one hundred thirty-six billion, five hundred sixty-four million, one hundred thirteen thousand, two hundred twenty-one".