11211312112 has 180 divisors, whose sum is σ = 29914080168. Its totient is φ = 4031596800.

The previous prime is 11211312109. The next prime is 11211312149. The reversal of 11211312112 is 21121311211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1228687 + ... + 1237777.

Almost surely, 2^11211312112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11211312112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14957040084).

11211312112 is an abundant number, since it is smaller than the sum of its proper divisors (18702768056).

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

11211312112 is a wasteful number, since it uses less digits than its factorization.

11211312112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9148 (or 9124 counting only the distinct ones).

The product of its digits is 24, while the sum is 16.

11211312112 divided by its sum of digits (16) gives a palindrome (700707007).

Adding to 11211312112 its reverse (21121311211), we get a palindrome (32332623323).

Subtracting 11211312112 from its reverse (21121311211), we obtain a palindrome (9909999099).

It can be divided in two parts, 11211 and 312112, that added together give a palindrome (323323).

The spelling of 11211312112 in words is "eleven billion, two hundred eleven million, three hundred twelve thousand, one hundred twelve".