136565501221 has 8 divisors (see below), whose sum is σ = 145898730080. Its totient is φ = 127446829488.

The previous prime is 136565501213. The next prime is 136565501231. The reversal of 136565501221 is 122105565631.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 136565501221 - 2³ = 136565501213 is a prime.

It is a super-2 number, since 2×136565501221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136565501231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53637966 + ... + 53640511.

It is an arithmetic number, because the mean of its divisors is an integer number (18237341260).

Almost surely, 2^136565501221 is an apocalyptic number.

It is an amenable number.

136565501221 is a deficient number, since it is larger than the sum of its proper divisors (9333228859).

136565501221 is a wasteful number, since it uses less digits than its factorization.

136565501221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107278563.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 136565501221 in words is "one hundred thirty-six billion, five hundred sixty-five million, five hundred one thousand, two hundred twenty-one".