11311132212 has 144 divisors (see below), whose sum is σ = 31206651840. Its totient is φ = 3442093056.

The previous prime is 11311132199. The next prime is 11311132213. The reversal of 11311132212 is 21223111311.

11311132212 is a `hidden beast` number, since 11 + 311 + 132 + 212 = 666.

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.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11311132213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2705868 + ... + 2710044.

It is an arithmetic number, because the mean of its divisors is an integer number (216712860).

Almost surely, 2^11311132212 is an apocalyptic number.

11311132212 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 11311132212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15603325920).

11311132212 is an abundant number, since it is smaller than the sum of its proper divisors (19895519628).

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

11311132212 is a wasteful number, since it uses less digits than its factorization.

11311132212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4350 (or 4345 counting only the distinct ones).

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

Adding to 11311132212 its reverse (21223111311), we get a palindrome (32534243523).

The spelling of 11311132212 in words is "eleven billion, three hundred eleven million, one hundred thirty-two thousand, two hundred twelve".