11133231312 has 80 divisors (see below), whose sum is σ = 34003002240. Its totient is φ = 3071233536.

The previous prime is 11133231301. The next prime is 11133231331. The reversal of 11133231312 is 21313233111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 561543 + ... + 581030.

It is an arithmetic number, because the mean of its divisors is an integer number (425037528).

Almost surely, 2^11133231312 is an apocalyptic number.

11133231312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11133231312 is an abundant number, since it is smaller than the sum of its proper divisors (22869770928).

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

11133231312 is a wasteful number, since it uses less digits than its factorization.

11133231312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142620 (or 1142614 counting only the distinct ones).

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

Adding to 11133231312 its reverse (21313233111), we get a palindrome (32446464423).

The spelling of 11133231312 in words is "eleven billion, one hundred thirty-three million, two hundred thirty-one thousand, three hundred twelve".