211423340211 has 4 divisors (see below), whose sum is σ = 281897786952. Its totient is φ = 140948893472.

The previous prime is 211423340201. The next prime is 211423340239. The reversal of 211423340211 is 112043324112.

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 211423340211 - 2¹⁷ = 211423209139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211423340201) 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, 35237223366 + ... + 35237223371.

It is an arithmetic number, because the mean of its divisors is an integer number (70474446738).

Almost surely, 2^211423340211 is an apocalyptic number.

211423340211 is a deficient number, since it is larger than the sum of its proper divisors (70474446741).

211423340211 is an equidigital number, since it uses as much as digits as its factorization.

211423340211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70474446740.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 211423340211 its reverse (112043324112), we get a palindrome (323466664323).

The spelling of 211423340211 in words is "two hundred eleven billion, four hundred twenty-three million, three hundred forty thousand, two hundred eleven".