11213133312 has 80 divisors (see below), whose sum is σ = 29923732080. Its totient is φ = 3731300352.

The previous prime is 11213133293. The next prime is 11213133317. The reversal of 11213133312 is 21333131211.

It is a happy number.

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 (11213133317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 935614 + ... + 947522.

It is an arithmetic number, because the mean of its divisors is an integer number (374046651).

Almost surely, 2^11213133312 is an apocalyptic number.

11213133312 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 11213133312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14961866040).

11213133312 is an abundant number, since it is smaller than the sum of its proper divisors (18710598768).

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

11213133312 is an equidigital number, since it uses as much as digits as its factorization.

11213133312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12543 (or 12527 counting only the distinct ones).

The product of its digits is 324, while the sum is 21.

Adding to 11213133312 its reverse (21333131211), we get a palindrome (32546264523).

The spelling of 11213133312 in words is "eleven billion, two hundred thirteen million, one hundred thirty-three thousand, three hundred twelve".