211012220111 has 16 divisors (see below), whose sum is σ = 268449158400. Its totient is φ = 164425103640.

The previous prime is 211012220101. The next prime is 211012220123. The reversal of 211012220111 is 111022210112.

It is not a de Polignac number, because 211012220111 - 2³⁴ = 193832350927 is a prime.

It is a super-2 number, since 2×211012220111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211012220101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27959681 + ... + 27967226.

It is an arithmetic number, because the mean of its divisors is an integer number (16778072400).

Almost surely, 2^211012220111 is an apocalyptic number.

211012220111 is a deficient number, since it is larger than the sum of its proper divisors (57436938289).

211012220111 is an equidigital number, since it uses as much as digits as its factorization.

211012220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55926939 (or 55926925 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211012220111 its reverse (111022210112), we get a palindrome (322034430223).

Subtracting from 211012220111 its reverse (111022210112), we obtain a palindrome (99990009999).

It can be divided in two parts, 2110 and 12220111, that added together give a palindrome (12222221).

The spelling of 211012220111 in words is "two hundred eleven billion, twelve million, two hundred twenty thousand, one hundred eleven".