13440133212 has 96 divisors (see below), whose sum is σ = 34859946240. Its totient is φ = 3995819520.

The previous prime is 13440133183. The next prime is 13440133229. The reversal of 13440133212 is 21233104431.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4803798 + ... + 4806594.

It is an arithmetic number, because the mean of its divisors is an integer number (363124440).

Almost surely, 2^13440133212 is an apocalyptic number.

13440133212 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 13440133212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17429973120).

13440133212 is an abundant number, since it is smaller than the sum of its proper divisors (21419813028).

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

13440133212 is a wasteful number, since it uses less digits than its factorization.

13440133212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3491 (or 3489 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 13440133212 its reverse (21233104431), we get a palindrome (34673237643).

The spelling of 13440133212 in words is "thirteen billion, four hundred forty million, one hundred thirty-three thousand, two hundred twelve".