211403620211 has 4 divisors (see below), whose sum is σ = 241604137392. Its totient is φ = 181203103032.

The previous prime is 211403620201. The next prime is 211403620217. The reversal of 211403620211 is 112026304112.

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

It is a de Polignac number, because none of the positive numbers 2^k-211403620211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211403620217) 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, 15100258580 + ... + 15100258593.

It is an arithmetic number, because the mean of its divisors is an integer number (60401034348).

Almost surely, 2^211403620211 is an apocalyptic number.

211403620211 is a deficient number, since it is larger than the sum of its proper divisors (30200517181).

211403620211 is an equidigital number, since it uses as much as digits as its factorization.

211403620211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30200517180.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 211403620211 its reverse (112026304112), we get a palindrome (323429924323).

The spelling of 211403620211 in words is "two hundred eleven billion, four hundred three million, six hundred twenty thousand, two hundred eleven".