11311433412 has 144 divisors (see below), whose sum is σ = 29633506560. Its totient is φ = 3352014848.

The previous prime is 11311433407. The next prime is 11311433437. The reversal of 11311433412 is 21433411311.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4725688 + ... + 4728080.

It is an arithmetic number, because the mean of its divisors is an integer number (205788240).

Almost surely, 2^11311433412 is an apocalyptic number.

11311433412 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 11311433412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14816753280).

11311433412 is an abundant number, since it is smaller than the sum of its proper divisors (18322073148).

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

11311433412 is a wasteful number, since it uses less digits than its factorization.

11311433412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2510 (or 2491 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

Adding to 11311433412 its reverse (21433411311), we get a palindrome (32744844723).

The spelling of 11311433412 in words is "eleven billion, three hundred eleven million, four hundred thirty-three thousand, four hundred twelve".