211112111010 has 128 divisors (see below), whose sum is σ = 532824355584. Its totient is φ = 53477867520.

The previous prime is 211112110997. The next prime is 211112111017. The reversal of 211112111010 is 10111211112.

It is not an unprimeable number, because it can be changed into a prime (211112111017) 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 63 ways as a sum of consecutive naturals, for example, 8391250 + ... + 8416370.

It is an arithmetic number, because the mean of its divisors is an integer number (4162690278).

Almost surely, 2^211112111010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211112111010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266412177792).

211112111010 is an abundant number, since it is smaller than the sum of its proper divisors (321712244574).

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

211112111010 is a wasteful number, since it uses less digits than its factorization.

211112111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25348.

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

Adding to 211112111010 its reverse (10111211112), we get a palindrome (221223322122).

The spelling of 211112111010 in words is "two hundred eleven billion, one hundred twelve million, one hundred eleven thousand, ten".