211665142211 has 2 divisors, whose sum is σ = 211665142212. Its totient is φ = 211665142210.

The previous prime is 211665142159. The next prime is 211665142219. The reversal of 211665142211 is 112241566112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211665142211 - 2¹⁰ = 211665141187 is a prime.

It is not a weakly prime, because it can be changed into another prime (211665142219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105832571105 + 105832571106.

It is an arithmetic number, because the mean of its divisors is an integer number (105832571106).

Almost surely, 2^211665142211 is an apocalyptic number.

211665142211 is a deficient number, since it is larger than the sum of its proper divisors (1).

211665142211 is an equidigital number, since it uses as much as digits as its factorization.

211665142211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 32.

The spelling of 211665142211 in words is "two hundred eleven billion, six hundred sixty-five million, one hundred forty-two thousand, two hundred eleven".