211540655011 has 16 divisors (see below), whose sum is σ = 247720777920. Its totient is φ = 176852805120.

The previous prime is 211540654993. The next prime is 211540655021. The reversal of 211540655011 is 110556045112.

It is a cyclic number.

It is not a de Polignac number, because 211540655011 - 2³¹ = 209393171363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211540655021) 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, 1052455 + ... + 1237231.

It is an arithmetic number, because the mean of its divisors is an integer number (15482548620).

Almost surely, 2^211540655011 is an apocalyptic number.

211540655011 is a deficient number, since it is larger than the sum of its proper divisors (36180122909).

211540655011 is a wasteful number, since it uses less digits than its factorization.

211540655011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188814.

The product of its (nonzero) digits is 6000, while the sum is 31.

The spelling of 211540655011 in words is "two hundred eleven billion, five hundred forty million, six hundred fifty-five thousand, eleven".