11213213112 has 96 divisors (see below), whose sum is σ = 31659788160. Its totient is φ = 3581280000.

The previous prime is 11213213111. The next prime is 11213213129. The reversal of 11213213112 is 21131231211.

11213213112 is a `hidden beast` number, since 11 + 21 + 321 + 311 + 2 = 666.

It is a super-2 number, since 2×11213213112² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213213111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 200562 + ... + 250302.

It is an arithmetic number, because the mean of its divisors is an integer number (329789460).

Almost surely, 2^11213213112 is an apocalyptic number.

11213213112 is a gapful number since it is divisible by the number (12) 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 11213213112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15829894080).

11213213112 is an abundant number, since it is smaller than the sum of its proper divisors (20446575048).

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

11213213112 is a wasteful number, since it uses less digits than its factorization.

11213213112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49885 (or 49878 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 11213213112 its reverse (21131231211), we get a palindrome (32344444323).

The spelling of 11213213112 in words is "eleven billion, two hundred thirteen million, two hundred thirteen thousand, one hundred twelve".