136564426121 has 2 divisors, whose sum is σ = 136564426122. Its totient is φ = 136564426120.

The previous prime is 136564426111. The next prime is 136564426189. The reversal of 136564426121 is 121624465631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76129087225 + 60435338896 = 275915^2 + 245836^2 .

It is a cyclic number.

It is not a de Polignac number, because 136564426121 - 2³⁰ = 135490684297 is a prime.

It is not a weakly prime, because it can be changed into another prime (136564426111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68282213060 + 68282213061.

It is an arithmetic number, because the mean of its divisors is an integer number (68282213061).

Almost surely, 2^136564426121 is an apocalyptic number.

It is an amenable number.

136564426121 is a deficient number, since it is larger than the sum of its proper divisors (1).

136564426121 is an equidigital number, since it uses as much as digits as its factorization.

136564426121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 41.

The spelling of 136564426121 in words is "one hundred thirty-six billion, five hundred sixty-four million, four hundred twenty-six thousand, one hundred twenty-one".