136214722521 has 20 divisors (see below), whose sum is σ = 203499906852. Its totient is φ = 90801489888.

The previous prime is 136214722487. The next prime is 136214722547. The reversal of 136214722521 is 125227412631.

136214722521 is a `hidden beast` number, since 1 + 3 + 62 + 1 + 4 + 72 + 2 + 521 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19219940496 + 116994782025 = 138636^2 + 342045^2 .

It is a de Polignac number, because none of the positive numbers 2^k-136214722521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136214722321) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 885675 + ... + 1028031.

Almost surely, 2^136214722521 is an apocalyptic number.

It is an amenable number.

136214722521 is a deficient number, since it is larger than the sum of its proper divisors (67285184331).

136214722521 is a wasteful number, since it uses less digits than its factorization.

136214722521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154182 (or 154173 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The spelling of 136214722521 in words is "one hundred thirty-six billion, two hundred fourteen million, seven hundred twenty-two thousand, five hundred twenty-one".