211111022211 has 16 divisors (see below), whose sum is σ = 289922129664. Its totient is φ = 136542223584.

The previous prime is 211111022207. The next prime is 211111022237. The reversal of 211111022211 is 112220111112.

It is a happy number.

It is not a de Polignac number, because 211111022211 - 2² = 211111022207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211111022201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2701975 + ... + 2779008.

It is an arithmetic number, because the mean of its divisors is an integer number (18120133104).

Almost surely, 2^211111022211 is an apocalyptic number.

211111022211 is a deficient number, since it is larger than the sum of its proper divisors (78811107453).

211111022211 is a wasteful number, since it uses less digits than its factorization.

211111022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5481370.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211111022211 its reverse (112220111112), we get a palindrome (323331133323).

The spelling of 211111022211 in words is "two hundred eleven billion, one hundred eleven million, twenty-two thousand, two hundred eleven".