211001111112 has 128 divisors (see below), whose sum is σ = 594673643520. Its totient is φ = 61834080000.

The previous prime is 211001111059. The next prime is 211001111117. The reversal of 211001111112 is 211111100112.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (211001111117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1054537 + ... + 1238567.

It is an arithmetic number, because the mean of its divisors is an integer number (4645887840).

Almost surely, 2^211001111112 is an apocalyptic number.

211001111112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211001111112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297336821760).

211001111112 is an abundant number, since it is smaller than the sum of its proper divisors (383672532408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211001111112 is a wasteful number, since it uses less digits than its factorization.

211001111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184195 (or 184191 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 211001111112 its reverse (211111100112), we get a palindrome (422112211224).

The spelling of 211001111112 in words is "two hundred eleven billion, one million, one hundred eleven thousand, one hundred twelve".