211716056011 has 4 divisors (see below), whose sum is σ = 215304463800. Its totient is φ = 208127648224.

The previous prime is 211716056009. The next prime is 211716056017. The reversal of 211716056011 is 110650617112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211716056011 - 2¹ = 211716056009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211716056017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1794203806 + ... + 1794203923.

It is an arithmetic number, because the mean of its divisors is an integer number (53826115950).

Almost surely, 2^211716056011 is an apocalyptic number.

211716056011 is a deficient number, since it is larger than the sum of its proper divisors (3588407789).

211716056011 is an equidigital number, since it uses as much as digits as its factorization.

211716056011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3588407788.

The product of its (nonzero) digits is 2520, while the sum is 31.

The spelling of 211716056011 in words is "two hundred eleven billion, seven hundred sixteen million, fifty-six thousand, eleven".