11431423212 has 72 divisors (see below), whose sum is σ = 29494795008. Its totient is φ = 3443251680.

The previous prime is 11431423187. The next prime is 11431423229. The reversal of 11431423212 is 21232413411.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 218913 + ... + 266055.

Almost surely, 2^11431423212 is an apocalyptic number.

11431423212 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 11431423212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14747397504).

11431423212 is an abundant number, since it is smaller than the sum of its proper divisors (18063371796).

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

11431423212 is a wasteful number, since it uses less digits than its factorization.

11431423212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47339 (or 47326 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

Adding to 11431423212 its reverse (21232413411), we get a palindrome (32663836623).

The spelling of 11431423212 in words is "eleven billion, four hundred thirty-one million, four hundred twenty-three thousand, two hundred twelve".