136211066721 has 16 divisors (see below), whose sum is σ = 201805665600. Its totient is φ = 90802206144.

The previous prime is 136211066707. The next prime is 136211066833. The reversal of 136211066721 is 127660112631.

136211066721 is a `hidden beast` number, since 1 + 3 + 621 + 1 + 0 + 6 + 6 + 7 + 21 = 666.

It is not a de Polignac number, because 136211066721 - 2¹⁴ = 136211050337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136211066221) 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, 372985 + ... + 641513.

It is an arithmetic number, because the mean of its divisors is an integer number (12612854100).

Almost surely, 2^136211066721 is an apocalyptic number.

It is an amenable number.

136211066721 is a deficient number, since it is larger than the sum of its proper divisors (65594598879).

136211066721 is a wasteful number, since it uses less digits than its factorization.

136211066721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287325 (or 287319 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 136211066721 in words is "one hundred thirty-six billion, two hundred eleven million, sixty-six thousand, seven hundred twenty-one".